621604624 has 45 divisors (see below), whose sum is σ = 1263661959. Its totient is φ = 296192160.

The previous prime is 621604597. The next prime is 621604667. The reversal of 621604624 is 426406126.

The square root of 621604624 is 24932.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 2293609 + ... + 2293879.

Almost surely, 2^621604624 is an apocalyptic number.

621604624 is the 24932-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621604624

621604624 is an abundant number, since it is smaller than the sum of its proper divisors (642057335).

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

621604624 is an equidigital number, since it uses as much as digits as its factorization.

621604624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The cubic root of 621604624 is about 853.4368914576.

The spelling of 621604624 in words is "six hundred twenty-one million, six hundred four thousand, six hundred twenty-four".