23091728 has 20 divisors (see below), whose sum is σ = 48807888. Its totient is φ = 10496160.

The previous prime is 23091703. The next prime is 23091769. The reversal of 23091728 is 82719032.

It is a junction number, because it is equal to n+sod(n) for n = 23091694 and 23091703.

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, 65426 + ... + 65777.

Almost surely, 2^23091728 is an apocalyptic number.

It is an amenable number.

23091728 is an abundant number, since it is smaller than the sum of its proper divisors (25716160).

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

23091728 is a wasteful number, since it uses less digits than its factorization.

23091728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131222 (or 131216 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 23091728 is about 4805.3853123345. The cubic root of 23091728 is about 284.7642577079.

The spelling of 23091728 in words is "twenty-three million, ninety-one thousand, seven hundred twenty-eight".