25556880 has 40 divisors (see below), whose sum is σ = 79227072. Its totient is φ = 6815104.

The previous prime is 25556879. The next prime is 25556891. The reversal of 25556880 is 8865552.

It is a tau number, because it is divible by the number of its divisors (40).

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, 53004 + ... + 53483.

Almost surely, 2^25556880 is an apocalyptic number.

25556880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25556880 is an abundant number, since it is smaller than the sum of its proper divisors (53670192).

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

25556880 is a wasteful number, since it uses less digits than its factorization.

25556880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106503 (or 106497 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 39.

The square root of 25556880 is about 5055.3812912579. The cubic root of 25556880 is about 294.5569524824.

The spelling of 25556880 in words is "twenty-five million, five hundred fifty-six thousand, eight hundred eighty".