623865956 has 12 divisors (see below), whose sum is σ = 1247731968. Its totient is φ = 267371112.

The previous prime is 623865943. The next prime is 623865989. The reversal of 623865956 is 659568326.

623865956 is an admirable 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, 11140436 + ... + 11140491.

It is an arithmetic number, because the mean of its divisors is an integer number (103977664).

Almost surely, 2^623865956 is an apocalyptic number.

It is an amenable number.

623865956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

623865956 is a wasteful number, since it uses less digits than its factorization.

623865956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22280938 (or 22280936 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 50.

The square root of 623865956 is about 24977.3088222090. The cubic root of 623865956 is about 854.4705434683.

The spelling of 623865956 in words is "six hundred twenty-three million, eight hundred sixty-five thousand, nine hundred fifty-six".