25379540 has 24 divisors (see below), whose sum is σ = 53975040. Its totient is φ = 10022688.

The previous prime is 25379539. The next prime is 25379561. The reversal of 25379540 is 4597352.

It is a super-2 number, since 2×25379540² = 1288242101223200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25379540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6452 + ... + 9611.

It is an arithmetic number, because the mean of its divisors is an integer number (2248960).

Almost surely, 2^25379540 is an apocalyptic number.

25379540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25379540 is an abundant number, since it is smaller than the sum of its proper divisors (28595500).

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

25379540 is a wasteful number, since it uses less digits than its factorization.

25379540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16151 (or 16149 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 25379540 is about 5037.8110325815. The cubic root of 25379540 is about 293.8740571524.

The spelling of 25379540 in words is "twenty-five million, three hundred seventy-nine thousand, five hundred forty".