25516988 has 12 divisors (see below), whose sum is σ = 51034032. Its totient is φ = 10935840.

The previous prime is 25516979. The next prime is 25516991. The reversal of 25516988 is 88961552.

25516988 is an admirable number.

It is a super-2 number, since 2×25516988² = 1302233353184288, which contains 22 as substring.

It is a congruent number.

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, 455633 + ... + 455688.

It is an arithmetic number, because the mean of its divisors is an integer number (4252836).

Almost surely, 2^25516988 is an apocalyptic number.

25516988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25516988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25516988 is a wasteful number, since it uses less digits than its factorization.

25516988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911332 (or 911330 counting only the distinct ones).

The product of its digits is 172800, while the sum is 44.

The square root of 25516988 is about 5051.4342517744. The cubic root of 25516988 is about 294.4036136676.

The spelling of 25516988 in words is "twenty-five million, five hundred sixteen thousand, nine hundred eighty-eight".