25578372 has 12 divisors (see below), whose sum is σ = 59682896. Its totient is φ = 8526120.

The previous prime is 25578349. The next prime is 25578407. The reversal of 25578372 is 27387552.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×25578372² = 1308506228340768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25578372.

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, 1065754 + ... + 1065777.

Almost surely, 2^25578372 is an apocalyptic number.

It is an amenable number.

25578372 is an abundant number, since it is smaller than the sum of its proper divisors (34104524).

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

25578372 is a wasteful number, since it uses less digits than its factorization.

25578372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131538 (or 2131536 counting only the distinct ones).

The product of its digits is 117600, while the sum is 39.

The square root of 25578372 is about 5057.5065002430. The cubic root of 25578372 is about 294.6394983471.

The spelling of 25578372 in words is "twenty-five million, five hundred seventy-eight thousand, three hundred seventy-two".