23132728 has 16 divisors (see below), whose sum is σ = 45657000. Its totient is φ = 10957536.

The previous prime is 23132719. The next prime is 23132731. The reversal of 23132728 is 82723132.

It is a junction number, because it is equal to n+sod(n) for n = 23132696 and 23132705.

It is a congruent 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, 75943 + ... + 76246.

Almost surely, 2^23132728 is an apocalyptic number.

It is an amenable number.

23132728 is a deficient number, since it is larger than the sum of its proper divisors (22524272).

23132728 is a wasteful number, since it uses less digits than its factorization.

23132728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152214 (or 152210 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 23132728 is about 4809.6494674768. The cubic root of 23132728 is about 284.9326936577.

It can be divided in two parts, 2313 and 2728, that added together give a square (5041 = 71²).

The spelling of 23132728 in words is "twenty-three million, one hundred thirty-two thousand, seven hundred twenty-eight".