25492840 has 16 divisors (see below), whose sum is σ = 57358980. Its totient is φ = 10197120.

The previous prime is 25492829. The next prime is 25492867. The reversal of 25492840 is 4829452.

It can be written as a sum of positive squares in 2 ways, for example, as 20412324 + 5080516 = 4518^2 + 2254^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25492796 and 25492805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318621 + ... + 318700.

Almost surely, 2^25492840 is an apocalyptic number.

25492840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25492840 is an abundant number, since it is smaller than the sum of its proper divisors (31866140).

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

25492840 is a wasteful number, since it uses less digits than its factorization.

25492840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637332 (or 637328 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 25492840 is about 5049.0434737681. The cubic root of 25492840 is about 294.3107147427.

The spelling of 25492840 in words is "twenty-five million, four hundred ninety-two thousand, eight hundred forty".