31712406 has 60 divisors (see below), whose sum is σ = 73632060. Its totient is φ = 9104040.

The previous prime is 31712389. The next prime is 31712407. The reversal of 31712406 is 60421713.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31712407) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1669065 + ... + 1669083.

It is an arithmetic number, because the mean of its divisors is an integer number (1227201).

Almost surely, 2^31712406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31712406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36816030).

31712406 is an abundant number, since it is smaller than the sum of its proper divisors (41919654).

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

31712406 is an equidigital number, since it uses as much as digits as its factorization.

31712406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 31712406 is about 5631.3769186585. The cubic root of 31712406 is about 316.5262488556.

Multiplying 31712406 by its sum of digits (24), we get a square (761097744 = 27588²).

The spelling of 31712406 in words is "thirty-one million, seven hundred twelve thousand, four hundred six".