25129988 has 24 divisors (see below), whose sum is σ = 48168960. Its totient is φ = 11400480.

The previous prime is 25129981. The next prime is 25129999. The reversal of 25129988 is 88992152.

It is not an unprimeable number, because it can be changed into a prime (25129981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028 + ... + 7163.

It is an arithmetic number, because the mean of its divisors is an integer number (2007040).

Almost surely, 2^25129988 is an apocalyptic number.

It is an amenable number.

25129988 is a deficient number, since it is larger than the sum of its proper divisors (23038972).

25129988 is a wasteful number, since it uses less digits than its factorization.

25129988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8267 (or 8265 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 25129988 is about 5012.9819469055. The cubic root of 25129988 is about 292.9076809640.

The spelling of 25129988 in words is "twenty-five million, one hundred twenty-nine thousand, nine hundred eighty-eight".