25438986 has 24 divisors (see below), whose sum is σ = 58019520. Its totient is φ = 8033256.

The previous prime is 25438979. The next prime is 25438991. The reversal of 25438986 is 68983452.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36850 + ... + 37533.

It is an arithmetic number, because the mean of its divisors is an integer number (2417480).

Almost surely, 2^25438986 is an apocalyptic number.

25438986 is an abundant number, since it is smaller than the sum of its proper divisors (32580534).

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

25438986 is a wasteful number, since it uses less digits than its factorization.

25438986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74410 (or 74407 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 25438986 is about 5043.7075648773. The cubic root of 25438986 is about 294.1033233950.

The spelling of 25438986 in words is "twenty-five million, four hundred thirty-eight thousand, nine hundred eighty-six".