25870720 has 32 divisors (see below), whose sum is σ = 61848720. Its totient is φ = 10348032.

The previous prime is 25870717. The next prime is 25870739. The reversal of 25870720 is 2707852.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19572 + ... + 20851.

Almost surely, 2^25870720 is an apocalyptic number.

25870720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25870720 is an abundant number, since it is smaller than the sum of its proper divisors (35978000).

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

25870720 is an equidigital number, since it uses as much as digits as its factorization.

25870720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40442 (or 40430 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 25870720 is about 5086.3267688972. The cubic root of 25870720 is about 295.7577760267.

The spelling of 25870720 in words is "twenty-five million, eight hundred seventy thousand, seven hundred twenty".