621243204 has 24 divisors (see below), whose sum is σ = 1458465120. Its totient is φ = 205809984.

The previous prime is 621243197. The next prime is 621243239. The reversal of 621243204 is 402342126.

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 7 ways as a sum of consecutive naturals, for example, 156849 + ... + 160760.

It is an arithmetic number, because the mean of its divisors is an integer number (60769380).

Almost surely, 2^621243204 is an apocalyptic number.

It is an amenable number.

621243204 is an abundant number, since it is smaller than the sum of its proper divisors (837221916).

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

621243204 is a wasteful number, since it uses less digits than its factorization.

621243204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317779 (or 317777 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 621243204 is about 24924.7508312521. The cubic root of 621243204 is about 853.2714545923.

The spelling of 621243204 in words is "six hundred twenty-one million, two hundred forty-three thousand, two hundred four".