25440988 has 6 divisors (see below), whose sum is σ = 44521736. Its totient is φ = 12720492.

The previous prime is 25440979. The next prime is 25441043. The reversal of 25440988 is 88904452.

It is a super-2 number, since 2×25440988² = 1294487740832288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25440988.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3180120 + ... + 3180127.

Almost surely, 2^25440988 is an apocalyptic number.

It is an amenable number.

25440988 is a deficient number, since it is larger than the sum of its proper divisors (19080748).

25440988 is a wasteful number, since it uses less digits than its factorization.

25440988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6360251 (or 6360249 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 25440988 is about 5043.9060260873. The cubic root of 25440988 is about 294.1110383174. Note that the first 3 decimals are identical.

The spelling of 25440988 in words is "twenty-five million, four hundred forty thousand, nine hundred eighty-eight".