25660492 has 48 divisors (see below), whose sum is σ = 53357472. Its totient is φ = 10644480.

The previous prime is 25660471. The next prime is 25660501. The reversal of 25660492 is 29406652.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

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 in 15 ways as a sum of consecutive naturals, for example, 64438 + ... + 64834.

It is an arithmetic number, because the mean of its divisors is an integer number (1111614).

Almost surely, 2^25660492 is an apocalyptic number.

25660492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25660492 is an abundant number, since it is smaller than the sum of its proper divisors (27696980).

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

25660492 is a wasteful number, since it uses less digits than its factorization.

25660492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 25660492 is about 5065.6186196752. The cubic root of 25660492 is about 294.9544773191.

The spelling of 25660492 in words is "twenty-five million, six hundred sixty thousand, four hundred ninety-two".