28623665252 has 24 divisors (see below), whose sum is σ = 61650972096. Its totient is φ = 11323647648.

The previous prime is 28623665237. The next prime is 28623665261. The reversal of 28623665252 is 25256632682.

It is a junction number, because it is equal to n+sod(n) for n = 28623665197 and 28623665206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39317858 + ... + 39318585.

It is an arithmetic number, because the mean of its divisors is an integer number (2568790504).

Almost surely, 2^28623665252 is an apocalyptic number.

It is an amenable number.

28623665252 is an abundant number, since it is smaller than the sum of its proper divisors (33027306844).

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

28623665252 is a wasteful number, since it uses less digits than its factorization.

28623665252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78636467 (or 78636465 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 47.

The spelling of 28623665252 in words is "twenty-eight billion, six hundred twenty-three million, six hundred sixty-five thousand, two hundred fifty-two".