25978512 has 40 divisors (see below), whose sum is σ = 76699456. Its totient is φ = 7422336.

The previous prime is 25978501. The next prime is 25978517. The reversal of 25978512 is 21587952.

It is not an unprimeable number, because it can be changed into a prime (25978517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38323 + ... + 38994.

Almost surely, 2^25978512 is an apocalyptic number.

It is an amenable number.

25978512 is an abundant number, since it is smaller than the sum of its proper divisors (50720944).

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

25978512 is a wasteful number, since it uses less digits than its factorization.

25978512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77335 (or 77329 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 25978512 is about 5096.9120063034. The cubic root of 25978512 is about 296.1679713785.

The spelling of 25978512 in words is "twenty-five million, nine hundred seventy-eight thousand, five hundred twelve".