23639625 has 24 divisors (see below), whose sum is σ = 42616392. Its totient is φ = 12607200.

The previous prime is 23639599. The next prime is 23639659. The reversal of 23639625 is 52693632.

23639625 is a `hidden beast` number, since 23 + 6 + 3 + 9 + 625 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7551504 + 16088121 = 2748^2 + 4011^2 .

It is not a de Polignac number, because 23639625 - 2¹² = 23635529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23639625.

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, 9382 + ... + 11631.

It is an arithmetic number, because the mean of its divisors is an integer number (1775683).

Almost surely, 2^23639625 is an apocalyptic number.

23639625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23639625 is a deficient number, since it is larger than the sum of its proper divisors (18976767).

23639625 is a wasteful number, since it uses less digits than its factorization.

23639625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21034 (or 21021 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 23639625 is about 4862.0597487073. The cubic root of 23639625 is about 286.9988749769.

The spelling of 23639625 in words is "twenty-three million, six hundred thirty-nine thousand, six hundred twenty-five".