623465856 has 128 divisors (see below), whose sum is σ = 1981778400. Its totient is φ = 191821824.

The previous prime is 623465833. The next prime is 623465897. The reversal of 623465856 is 658564326.

623465856 is a `hidden beast` number, since 6 + 23 + 46 + 585 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37990 + ... + 51866.

Almost surely, 2^623465856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623465856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990889200).

623465856 is an abundant number, since it is smaller than the sum of its proper divisors (1358312544).

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

623465856 is a wasteful number, since it uses less digits than its factorization.

623465856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13913 (or 13895 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 623465856 is about 24969.2982680731. The cubic root of 623465856 is about 854.2878403459.

The spelling of 623465856 in words is "six hundred twenty-three million, four hundred sixty-five thousand, eight hundred fifty-six".