25288520 has 32 divisors (see below), whose sum is σ = 60247800. Its totient is φ = 9520128.

The previous prime is 25288519. The next prime is 25288541. The reversal of 25288520 is 2588252.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25060036 + 228484 = 5006^2 + 478^2 .

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, 17915 + ... + 19274.

Almost surely, 2^25288520 is an apocalyptic number.

25288520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25288520 is an abundant number, since it is smaller than the sum of its proper divisors (34959280).

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

25288520 is a wasteful number, since it uses less digits than its factorization.

25288520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37217 (or 37213 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 25288520 is about 5028.7692331226. The cubic root of 25288520 is about 293.5223242608.

The spelling of 25288520 in words is "twenty-five million, two hundred eighty-eight thousand, five hundred twenty".