25397964 has 18 divisors (see below), whose sum is σ = 64200500. Its totient is φ = 8465976.

The previous prime is 25397951. The next prime is 25397987. The reversal of 25397964 is 46979352.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 352714 + ... + 352785.

Almost surely, 2^25397964 is an apocalyptic number.

It is an amenable number.

25397964 is an abundant number, since it is smaller than the sum of its proper divisors (38802536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25397964 is a wasteful number, since it uses less digits than its factorization.

25397964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705509 (or 705504 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 25397964 is about 5039.6392728051. The cubic root of 25397964 is about 293.9451515063.

The spelling of 25397964 in words is "twenty-five million, three hundred ninety-seven thousand, nine hundred sixty-four".