23639025 has 24 divisors (see below), whose sum is σ = 39731584. Its totient is φ = 12398400.

The previous prime is 23639003. The next prime is 23639039. The reversal of 23639025 is 52093632.

It is not a de Polignac number, because 23639025 - 2⁶ = 23638961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23638983 and 23639001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1992 + ... + 7158.

Almost surely, 2^23639025 is an apocalyptic number.

23639025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23639025 is a deficient number, since it is larger than the sum of its proper divisors (16092559).

23639025 is a wasteful number, since it uses less digits than its factorization.

23639025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241 (or 5236 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 23639025 is about 4861.9980460712. The cubic root of 23639025 is about 286.9964468393.

The spelling of 23639025 in words is "twenty-three million, six hundred thirty-nine thousand, twenty-five".