25660872 has 48 divisors (see below), whose sum is σ = 70986240. Its totient is φ = 8370528.

The previous prime is 25660829. The next prime is 25660883. The reversal of 25660872 is 27806652.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 408 + ... + 7175.

It is an arithmetic number, because the mean of its divisors is an integer number (1478880).

Almost surely, 2^25660872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25660872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35493120).

25660872 is an abundant number, since it is smaller than the sum of its proper divisors (45325368).

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

25660872 is a wasteful number, since it uses less digits than its factorization.

25660872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642 (or 7635 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 25660872 is about 5065.6561272949. The cubic root of 25660872 is about 294.9559332817.

The spelling of 25660872 in words is "twenty-five million, six hundred sixty thousand, eight hundred seventy-two".