621931030 has 40 divisors (see below), whose sum is σ = 1306027872. Its totient is φ = 213225264.

The previous prime is 621931007. The next prime is 621931031. The reversal of 621931030 is 30139126.

It is a junction number, because it is equal to n+sod(n) for n = 621930986 and 621931004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621931031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11059 + ... + 36961.

Almost surely, 2^621931030 is an apocalyptic number.

621931030 is an abundant number, since it is smaller than the sum of its proper divisors (684096842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621931030 is an equidigital number, since it uses as much as digits as its factorization.

621931030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25938 (or 25917 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 621931030 is about 24938.5450658213. The cubic root of 621931030 is about 853.5862458686.

It can be divided in two parts, 6219 and 31030, that added together give a square (37249 = 193²).

The spelling of 621931030 in words is "six hundred twenty-one million, nine hundred thirty-one thousand, thirty".