25939992 has 64 divisors (see below), whose sum is σ = 70882560. Its totient is φ = 7862400.

The previous prime is 25939987. The next prime is 25939993. The reversal of 25939992 is 29993952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25939993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21567 + ... + 22737.

It is an arithmetic number, because the mean of its divisors is an integer number (1107540).

Almost surely, 2^25939992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25939992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35441280).

25939992 is an abundant number, since it is smaller than the sum of its proper divisors (44942568).

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

25939992 is a wasteful number, since it uses less digits than its factorization.

25939992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264 (or 1260 counting only the distinct ones).

The product of its digits is 393660, while the sum is 48.

The square root of 25939992 is about 5093.1318459274. The cubic root of 25939992 is about 296.0215165757.

The spelling of 25939992 in words is "twenty-five million, nine hundred thirty-nine thousand, nine hundred ninety-two".