623017728 has 54 divisors (see below), whose sum is σ = 1796320344. Its totient is φ = 207671808.

The previous prime is 623017709. The next prime is 623017739. The reversal of 623017728 is 827710326.

623017728 is a `hidden beast` number, since 623 + 0 + 1 + 7 + 7 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 623017692 and 623017701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132900 + ... + 137507.

Almost surely, 2^623017728 is an apocalyptic number.

It is an amenable number.

623017728 is an abundant number, since it is smaller than the sum of its proper divisors (1173302616).

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

623017728 is a wasteful number, since it uses less digits than its factorization.

623017728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270429 (or 270412 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 623017728 is about 24960.3230748322. The cubic root of 623017728 is about 854.0831127165.

The spelling of 623017728 in words is "six hundred twenty-three million, seventeen thousand, seven hundred twenty-eight".