623424904 has 8 divisors (see below), whose sum is σ = 1168921710. Its totient is φ = 311712448.

The previous prime is 623424899. The next prime is 623424947. The reversal of 623424904 is 409424326.

It can be written as a sum of positive squares in only one way, i.e., 367488900 + 255936004 = 19170^2 + 15998^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×623424904² = 777317221854818432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 623424904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38964049 + ... + 38964064.

Almost surely, 2^623424904 is an apocalyptic number.

It is an amenable number.

623424904 is a deficient number, since it is larger than the sum of its proper divisors (545496806).

623424904 is a wasteful number, since it uses less digits than its factorization.

623424904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77928119 (or 77928115 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 623424904 is about 24968.4782075320. The cubic root of 623424904 is about 854.2691354661.

The spelling of 623424904 in words is "six hundred twenty-three million, four hundred twenty-four thousand, nine hundred four".