25630986 has 32 divisors (see below), whose sum is σ = 54222336. Its totient is φ = 8064000.

The previous prime is 25630963. The next prime is 25630987. The reversal of 25630986 is 68903652.

It is not an unprimeable number, because it can be changed into a prime (25630987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5946 + ... + 9306.

It is an arithmetic number, because the mean of its divisors is an integer number (1694448).

Almost surely, 2^25630986 is an apocalyptic number.

25630986 is an abundant number, since it is smaller than the sum of its proper divisors (28591350).

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

25630986 is a wasteful number, since it uses less digits than its factorization.

25630986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 25630986 is about 5062.7054032404. The cubic root of 25630986 is about 294.8413817394.

The spelling of 25630986 in words is "twenty-five million, six hundred thirty thousand, nine hundred eighty-six".