25809260 has 12 divisors (see below), whose sum is σ = 54199488. Its totient is φ = 10323696.

The previous prime is 25809253. The next prime is 25809263. The reversal of 25809260 is 6290852.

It is a super-2 number, since 2×25809260² = 1332235803495200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25809263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645212 + ... + 645251.

It is an arithmetic number, because the mean of its divisors is an integer number (4516624).

Almost surely, 2^25809260 is an apocalyptic number.

25809260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25809260 is an abundant number, since it is smaller than the sum of its proper divisors (28390228).

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

25809260 is a wasteful number, since it uses less digits than its factorization.

25809260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290472 (or 1290470 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 25809260 is about 5080.2814882642. The cubic root of 25809260 is about 295.5233838094.

The spelling of 25809260 in words is "twenty-five million, eight hundred nine thousand, two hundred sixty".