25664428 has 12 divisors (see below), whose sum is σ = 44960440. Its totient is φ = 12818592.

The previous prime is 25664423. The next prime is 25664437. The reversal of 25664428 is 82446652.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25664423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675 + ... + 7357.

Almost surely, 2^25664428 is an apocalyptic number.

It is an amenable number.

25664428 is a deficient number, since it is larger than the sum of its proper divisors (19296012).

25664428 is a wasteful number, since it uses less digits than its factorization.

25664428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6816 (or 6814 counting only the distinct ones).

The product of its digits is 92160, while the sum is 37.

The square root of 25664428 is about 5066.0071061932. The cubic root of 25664428 is about 294.9695573297.

The spelling of 25664428 in words is "twenty-five million, six hundred sixty-four thousand, four hundred twenty-eight".