25299980 has 24 divisors (see below), whose sum is σ = 53228112. Its totient is φ = 10101312.

The previous prime is 25299979. The next prime is 25299983. The reversal of 25299980 is 8999252.

It is not an unprimeable number, because it can be changed into a prime (25299983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16319 + ... + 17801.

It is an arithmetic number, because the mean of its divisors is an integer number (2217838).

Almost surely, 2^25299980 is an apocalyptic number.

25299980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25299980 is an abundant number, since it is smaller than the sum of its proper divisors (27928132).

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

25299980 is a wasteful number, since it uses less digits than its factorization.

25299980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 2343 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 25299980 is about 5029.9085478764. The cubic root of 25299980 is about 293.5666560742.

The spelling of 25299980 in words is "twenty-five million, two hundred ninety-nine thousand, nine hundred eighty".