25871988 has 12 divisors (see below), whose sum is σ = 60368000. Its totient is φ = 8623992.

The previous prime is 25871981. The next prime is 25871999. The reversal of 25871988 is 88917852.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25871981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077988 + ... + 1078011.

Almost surely, 2^25871988 is an apocalyptic number.

It is an amenable number.

25871988 is an abundant number, since it is smaller than the sum of its proper divisors (34496012).

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

25871988 is a wasteful number, since it uses less digits than its factorization.

25871988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156006 (or 2156004 counting only the distinct ones).

The product of its digits is 322560, while the sum is 48.

The square root of 25871988 is about 5086.4514152796. The cubic root of 25871988 is about 295.7626079337.

The spelling of 25871988 in words is "twenty-five million, eight hundred seventy-one thousand, nine hundred eighty-eight".