25190988 has 12 divisors (see below), whose sum is σ = 58779000. Its totient is φ = 8396992.

The previous prime is 25190959. The next prime is 25190999. The reversal of 25190988 is 88909152.

It is a happy number.

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

It is a super-2 number, since 2×25190988² = 1269171752832288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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, 1049613 + ... + 1049636.

It is an arithmetic number, because the mean of its divisors is an integer number (4898250).

Almost surely, 2^25190988 is an apocalyptic number.

It is an amenable number.

25190988 is an abundant number, since it is smaller than the sum of its proper divisors (33588012).

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

25190988 is a wasteful number, since it uses less digits than its factorization.

25190988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099256 (or 2099254 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 25190988 is about 5019.0624622533. The cubic root of 25190988 is about 293.1444887578.

The spelling of 25190988 in words is "twenty-five million, one hundred ninety thousand, nine hundred eighty-eight".