25631936 has 56 divisors (see below), whose sum is σ = 57936384. Its totient is φ = 11137280.

The previous prime is 25631927. The next prime is 25631941. The reversal of 25631936 is 63913652.

It is a super-2 number, since 2×25631936² = 1313992286216192, which contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 25631896 and 25631905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15401 + ... + 16983.

Almost surely, 2^25631936 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 25631936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28968192).

25631936 is an abundant number, since it is smaller than the sum of its proper divisors (32304448).

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

25631936 is a wasteful number, since it uses less digits than its factorization.

25631936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629 (or 1619 counting only the distinct ones).

The product of its digits is 29160, while the sum is 35.

The square root of 25631936 is about 5062.7992257248. The cubic root of 25631936 is about 294.8450244117.

The spelling of 25631936 in words is "twenty-five million, six hundred thirty-one thousand, nine hundred thirty-six".