25664938 has 16 divisors (see below), whose sum is σ = 42045696. Its totient is φ = 11677680.

The previous prime is 25664929. The next prime is 25664959. The reversal of 25664938 is 83946652.

It is a junction number, because it is equal to n+sod(n) for n = 25664894 and 25664903.

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, 5106 + ... + 8797.

It is an arithmetic number, because the mean of its divisors is an integer number (2627856).

Almost surely, 2^25664938 is an apocalyptic number.

25664938 is a deficient number, since it is larger than the sum of its proper divisors (16380758).

25664938 is a wasteful number, since it uses less digits than its factorization.

25664938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13989.

The product of its digits is 311040, while the sum is 43.

The square root of 25664938 is about 5066.0574414430. The cubic root of 25664938 is about 294.9715111816.

The spelling of 25664938 in words is "twenty-five million, six hundred sixty-four thousand, nine hundred thirty-eight".