25965580 has 12 divisors (see below), whose sum is σ = 54527760. Its totient is φ = 10386224.

The previous prime is 25965557. The next prime is 25965607. The reversal of 25965580 is 8556952.

It is a super-2 number, since 2×25965580² = 1348422689472800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649120 + ... + 649159.

It is an arithmetic number, because the mean of its divisors is an integer number (4543980).

Almost surely, 2^25965580 is an apocalyptic number.

25965580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25965580 is an abundant number, since it is smaller than the sum of its proper divisors (28562180).

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

25965580 is a wasteful number, since it uses less digits than its factorization.

25965580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298288 (or 1298286 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 25965580 is about 5095.6432371193. The cubic root of 25965580 is about 296.1188194754.

The spelling of 25965580 in words is "twenty-five million, nine hundred sixty-five thousand, five hundred eighty".