624263428 has 6 divisors (see below), whose sum is σ = 1092461006. Its totient is φ = 312131712.

The previous prime is 624263377. The next prime is 624263441. The reversal of 624263428 is 824362426.

It can be written as a sum of positive squares in only one way, i.e., 349764804 + 274498624 = 18702^2 + 16568^2 .

It is a super-2 number, since 2×624263428² = 779409655076622368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78032925 + ... + 78032932.

Almost surely, 2^624263428 is an apocalyptic number.

It is an amenable number.

624263428 is a deficient number, since it is larger than the sum of its proper divisors (468197578).

624263428 is a wasteful number, since it uses less digits than its factorization.

624263428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156065861 (or 156065859 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 624263428 is about 24985.2642171341. The cubic root of 624263428 is about 854.6519692010.

The spelling of 624263428 in words is "six hundred twenty-four million, two hundred sixty-three thousand, four hundred twenty-eight".