31712680 has 64 divisors (see below), whose sum is σ = 74526480. Its totient is φ = 12134400.

The previous prime is 31712657. The next prime is 31712683. The reversal of 31712680 is 8621713.

It can be written as a sum of positive squares in 8 ways, for example, as 643204 + 31069476 = 802^2 + 5574^2 .

It is not an unprimeable number, because it can be changed into a prime (31712683) 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, 99882 + ... + 100198.

Almost surely, 2^31712680 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 31712680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37263240).

31712680 is an abundant number, since it is smaller than the sum of its proper divisors (42813800).

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

31712680 is a wasteful number, since it uses less digits than its factorization.

31712680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 31712680 is about 5631.4012465815. The cubic root of 31712680 is about 316.5271604646.

It can be divided in two parts, 317126 and 80, that added together give a triangular number (317206 = T₇₉₆).

The spelling of 31712680 in words is "thirty-one million, seven hundred twelve thousand, six hundred eighty".