621304928 has 24 divisors (see below), whose sum is σ = 1243929960. Its totient is φ = 305386240.

The previous prime is 621304897. The next prime is 621304991. The reversal of 621304928 is 829403126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162653 + ... + 166428.

It is an arithmetic number, because the mean of its divisors is an integer number (51830415).

Almost surely, 2^621304928 is an apocalyptic number.

It is an amenable number.

621304928 is an abundant number, since it is smaller than the sum of its proper divisors (622625032).

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

621304928 is a wasteful number, since it uses less digits than its factorization.

621304928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329150 (or 329142 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 621304928 is about 24925.9890074597. The cubic root of 621304928 is about 853.2997127596.

The spelling of 621304928 in words is "six hundred twenty-one million, three hundred four thousand, nine hundred twenty-eight".