25631712 has 72 divisors (see below), whose sum is σ = 74135880. Its totient is φ = 8398080.

The previous prime is 25631693. The next prime is 25631719. The reversal of 25631712 is 21713652.

It is a happy number.

25631712 is a `hidden beast` number, since 25 + 631 + 7 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25631719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16839 + ... + 18297.

It is an arithmetic number, because the mean of its divisors is an integer number (1029665).

Almost surely, 2^25631712 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 25631712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37067940).

25631712 is an abundant number, since it is smaller than the sum of its proper divisors (48504168).

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

25631712 is a wasteful number, since it uses less digits than its factorization.

25631712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536 (or 1525 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 25631712 is about 5062.7771035273. Note that the first 3 decimals coincide. The cubic root of 25631712 is about 294.8441655160.

The spelling of 25631712 in words is "twenty-five million, six hundred thirty-one thousand, seven hundred twelve".