25538870 has 32 divisors (see below), whose sum is σ = 53407296. Its totient is φ = 8611200.

The previous prime is 25538857. The next prime is 25538881. The reversal of 25538870 is 7883552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280 + ... + 7260.

It is an arithmetic number, because the mean of its divisors is an integer number (1668978).

Almost surely, 2^25538870 is an apocalyptic number.

25538870 is an abundant number, since it is smaller than the sum of its proper divisors (27868426).

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

25538870 is a wasteful number, since it uses less digits than its factorization.

25538870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 25538870 is about 5053.5997071395. The cubic root of 25538870 is about 294.4877445386.

The spelling of 25538870 in words is "twenty-five million, five hundred thirty-eight thousand, eight hundred seventy".