25129880 has 32 divisors (see below), whose sum is σ = 56700000. Its totient is φ = 10023936.

The previous prime is 25129879. The next prime is 25129903. The reversal of 25129880 is 8892152.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 25129880.

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, 19496 + ... + 20744.

It is an arithmetic number, because the mean of its divisors is an integer number (1771875).

Almost surely, 2^25129880 is an apocalyptic number.

25129880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25129880 is an abundant number, since it is smaller than the sum of its proper divisors (31570120).

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

25129880 is a wasteful number, since it uses less digits than its factorization.

25129880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 25129880 is about 5012.9711748623. The cubic root of 25129880 is about 292.9072613581.

The spelling of 25129880 in words is "twenty-five million, one hundred twenty-nine thousand, eight hundred eighty".