25631480 has 32 divisors (see below), whose sum is σ = 65910240. Its totient is φ = 8787840.

The previous prime is 25631449. The next prime is 25631503. The reversal of 25631480 is 8413652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45491 + ... + 46050.

It is an arithmetic number, because the mean of its divisors is an integer number (2059695).

Almost surely, 2^25631480 is an apocalyptic number.

25631480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25631480 is an abundant number, since it is smaller than the sum of its proper divisors (40278760).

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

25631480 is a wasteful number, since it uses less digits than its factorization.

25631480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91559 (or 91555 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 25631480 is about 5062.7541911493. The cubic root of 25631480 is about 294.8432759402.

The spelling of 25631480 in words is "twenty-five million, six hundred thirty-one thousand, four hundred eighty".