25761864 has 16 divisors (see below), whose sum is σ = 64404720. Its totient is φ = 8587280.

The previous prime is 25761839. The next prime is 25761871. The reversal of 25761864 is 46816752.

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, 536682 + ... + 536729.

It is an arithmetic number, because the mean of its divisors is an integer number (4025295).

Almost surely, 2^25761864 is an apocalyptic number.

25761864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25761864 is an abundant number, since it is smaller than the sum of its proper divisors (38642856).

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

25761864 is a wasteful number, since it uses less digits than its factorization.

25761864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073420 (or 1073416 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 25761864 is about 5075.6146425827. The cubic root of 25761864 is about 295.3423737255.

The spelling of 25761864 in words is "twenty-five million, seven hundred sixty-one thousand, eight hundred sixty-four".