25855872 has 64 divisors (see below), whose sum is σ = 78499200. Its totient is φ = 7386624.

The previous prime is 25855867. The next prime is 25855877. The reversal of 25855872 is 27855852.

It is an interprime number because it is at equal distance from previous prime (25855867) and next prime (25855877).

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×25855872² = 1337052233760768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25855877) 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, 2122 + ... + 7497.

It is an arithmetic number, because the mean of its divisors is an integer number (1226550).

Almost surely, 2^25855872 is an apocalyptic number.

It is an amenable number.

25855872 is an abundant number, since it is smaller than the sum of its proper divisors (52643328).

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

25855872 is an equidigital number, since it uses as much as digits as its factorization.

25855872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9643 (or 9631 counting only the distinct ones).

The product of its digits is 224000, while the sum is 42.

The square root of 25855872 is about 5084.8669599115. The cubic root of 25855872 is about 295.7011837112.

The spelling of 25855872 in words is "twenty-five million, eight hundred fifty-five thousand, eight hundred seventy-two".