25139288 has 16 divisors (see below), whose sum is σ = 48762000. Its totient is φ = 12136096.

The previous prime is 25139287. The next prime is 25139291. The reversal of 25139288 is 88293152.

It is a super-2 number, since 2×25139288² = 1263967602293888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25139281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53948 + ... + 54411.

It is an arithmetic number, because the mean of its divisors is an integer number (3047625).

Almost surely, 2^25139288 is an apocalyptic number.

It is an amenable number.

25139288 is a deficient number, since it is larger than the sum of its proper divisors (23622712).

25139288 is a wasteful number, since it uses less digits than its factorization.

25139288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108394 (or 108390 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 25139288 is about 5013.9094527125. The cubic root of 25139288 is about 292.9438091875.

The spelling of 25139288 in words is "twenty-five million, one hundred thirty-nine thousand, two hundred eighty-eight".