25604520 has 64 divisors (see below), whose sum is σ = 80161920. Its totient is φ = 6530304.

The previous prime is 25604507. The next prime is 25604539. The reversal of 25604520 is 2540652.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 1879 + ... + 7398.

It is an arithmetic number, because the mean of its divisors is an integer number (1252530).

Almost surely, 2^25604520 is an apocalyptic number.

25604520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25604520 is an abundant number, since it is smaller than the sum of its proper divisors (54557400).

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

25604520 is a wasteful number, since it uses less digits than its factorization.

25604520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9314 (or 9310 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25604520 is about 5060.0909082743. The cubic root of 25604520 is about 294.7398645188.

The spelling of 25604520 in words is "twenty-five million, six hundred four thousand, five hundred twenty".