25979868 has 18 divisors (see below), whose sum is σ = 65671424. Its totient is φ = 8659944.

The previous prime is 25979867. The next prime is 25979879. The reversal of 25979868 is 86897952.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25979867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360796 + ... + 360867.

Almost surely, 2^25979868 is an apocalyptic number.

It is an amenable number.

25979868 is an abundant number, since it is smaller than the sum of its proper divisors (39691556).

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

25979868 is a wasteful number, since it uses less digits than its factorization.

25979868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721673 (or 721668 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 25979868 is about 5097.0450262873. The cubic root of 25979868 is about 296.1731243139.

The spelling of 25979868 in words is "twenty-five million, nine hundred seventy-nine thousand, eight hundred sixty-eight".