25391970 has 48 divisors (see below), whose sum is σ = 66306240. Its totient is φ = 6741792.

The previous prime is 25391969. The next prime is 25392041. The reversal of 25391970 is 7919352.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27171 + ... + 28089.

It is an arithmetic number, because the mean of its divisors is an integer number (1381380).

Almost surely, 2^25391970 is an apocalyptic number.

25391970 is an abundant number, since it is smaller than the sum of its proper divisors (40914270).

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

25391970 is a wasteful number, since it uses less digits than its factorization.

25391970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 25391970 is about 5039.0445522936. The cubic root of 25391970 is about 293.9220256911.

The spelling of 25391970 in words is "twenty-five million, three hundred ninety-one thousand, nine hundred seventy".