2506784 standard form

Answer 1

Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, the way you wrote the number is the standard form for your example. However, one would usually write it with a comma separator(s) as: 2,506,784

Unless you are not in the USA, in which case

Standard form (also known as "standard index form" or "scientific notation") requires a single non-zero digit before the decimal point and a multiplier of a power of 10 which gets the decimal point back to where it was in the original number. To calculated the power of the ten count how many digits the decimal point needs to move; if it needs to move to the left make it negative:

2506784 = 2.506784 × 10^6