25392040 has 32 divisors (see below), whose sum is σ = 57276000. Its totient is φ = 10131264.

The previous prime is 25391969. The next prime is 25392041. The reversal of 25392040 is 4029352.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25391996 and 25392014.

It is not an unprimeable number, because it can be changed into a prime (25392041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29131 + ... + 29989.

It is an arithmetic number, because the mean of its divisors is an integer number (1789875).

Almost surely, 2^25392040 is an apocalyptic number.

25392040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25392040 is an abundant number, since it is smaller than the sum of its proper divisors (31883960).

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

25392040 is a wasteful number, since it uses less digits than its factorization.

25392040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609 (or 1605 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25392040 is about 5039.0514980500. The cubic root of 25392040 is about 293.9222957834.

The spelling of 25392040 in words is "twenty-five million, three hundred ninety-two thousand, forty".