25638375 has 32 divisors (see below), whose sum is σ = 48761856. Its totient is φ = 11719200.

The previous prime is 25638367. The next prime is 25638383. The reversal of 25638375 is 57383652.

It is an interprime number because it is at equal distance from previous prime (25638367) and next prime (25638383).

It is not a de Polignac number, because 25638375 - 2³ = 25638367 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2259 + ... + 7508.

It is an arithmetic number, because the mean of its divisors is an integer number (1523808).

Almost surely, 2^25638375 is an apocalyptic number.

25638375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25638375 is a deficient number, since it is larger than the sum of its proper divisors (23123481).

25638375 is an equidigital number, since it uses as much as digits as its factorization.

25638375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9792 (or 9782 counting only the distinct ones).

The product of its digits is 151200, while the sum is 39.

The square root of 25638375 is about 5063.4350988237. The cubic root of 25638375 is about 294.8697116894.

The spelling of 25638375 in words is "twenty-five million, six hundred thirty-eight thousand, three hundred seventy-five".