31970472 has 64 divisors (see below), whose sum is σ = 85432320. Its totient is φ = 9934848.

The previous prime is 31970459. The next prime is 31970473. The reversal of 31970472 is 27407913.

It is a super-2 number, since 2×31970472² = 2044222159805568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31970473) 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, 51508 + ... + 52124.

It is an arithmetic number, because the mean of its divisors is an integer number (1334880).

Almost surely, 2^31970472 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 31970472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42716160).

31970472 is an abundant number, since it is smaller than the sum of its proper divisors (53461848).

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

31970472 is a wasteful number, since it uses less digits than its factorization.

31970472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 31970472 is about 5654.2437160066. The cubic root of 31970472 is about 317.3825287208.

The spelling of 31970472 in words is "thirty-one million, nine hundred seventy thousand, four hundred seventy-two".