25400872 has 32 divisors (see below), whose sum is σ = 57297600. Its totient is φ = 10312704.

The previous prime is 25400849. The next prime is 25400887. The reversal of 25400872 is 27800452.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 25400872.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10873 + ... + 13000.

It is an arithmetic number, because the mean of its divisors is an integer number (1790550).

Almost surely, 2^25400872 is an apocalyptic number.

It is an amenable number.

25400872 is an abundant number, since it is smaller than the sum of its proper divisors (31896728).

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

25400872 is a wasteful number, since it uses less digits than its factorization.

25400872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23905 (or 23901 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 25400872 is about 5039.9277772603. The cubic root of 25400872 is about 293.9563697268.

The spelling of 25400872 in words is "twenty-five million, four hundred thousand, eight hundred seventy-two".