25620520 has 32 divisors (see below), whose sum is σ = 57918600. Its totient is φ = 10199808.

The previous prime is 25620509. The next prime is 25620533. The reversal of 25620520 is 2502652.

It can be written as a sum of positive squares in 4 ways, for example, as 25462116 + 158404 = 5046^2 + 398^2 .

It is a super-2 number, since 2×25620520² = 1312822090140800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25620491 and 25620500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7762 + ... + 10558.

Almost surely, 2^25620520 is an apocalyptic number.

25620520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25620520 is an abundant number, since it is smaller than the sum of its proper divisors (32298080).

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

25620520 is a wasteful number, since it uses less digits than its factorization.

25620520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037 (or 3033 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 25620520 is about 5061.6716606275. The cubic root of 25620520 is about 294.8012450339.

The spelling of 25620520 in words is "twenty-five million, six hundred twenty thousand, five hundred twenty".