25209768 has 32 divisors (see below), whose sum is σ = 64216800. Its totient is φ = 8244288.

The previous prime is 25209763. The next prime is 25209791. The reversal of 25209768 is 86790252.

It is a happy number.

It is a super-2 number, since 2×25209768² = 1271064805227648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25209763) 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, 8638 + ... + 11181.

It is an arithmetic number, because the mean of its divisors is an integer number (2006775).

Almost surely, 2^25209768 is an apocalyptic number.

It is an amenable number.

25209768 is an abundant number, since it is smaller than the sum of its proper divisors (39007032).

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

25209768 is a wasteful number, since it uses less digits than its factorization.

25209768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19881 (or 19877 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 25209768 is about 5020.9329810305. The cubic root of 25209768 is about 293.2173175276.

The spelling of 25209768 in words is "twenty-five million, two hundred nine thousand, seven hundred sixty-eight".