25399868 has 12 divisors (see below), whose sum is σ = 47869080. Its totient is φ = 11722992.

The previous prime is 25399867. The next prime is 25399883. The reversal of 25399868 is 86899352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25399867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244178 + ... + 244281.

It is an arithmetic number, because the mean of its divisors is an integer number (3989090).

Almost surely, 2^25399868 is an apocalyptic number.

It is an amenable number.

25399868 is a deficient number, since it is larger than the sum of its proper divisors (22469212).

25399868 is a wasteful number, since it uses less digits than its factorization.

25399868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488476 (or 488474 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 25399868 is about 5039.8281716741. The cubic root of 25399868 is about 293.9524966828.

The spelling of 25399868 in words is "twenty-five million, three hundred ninety-nine thousand, eight hundred sixty-eight".