31472272 has 40 divisors (see below), whose sum is σ = 66495744. Its totient is φ = 14342784.

The previous prime is 31472261. The next prime is 31472291. The reversal of 31472272 is 27227413.

It is a self number, because there is not a number n which added to its sum of digits gives 31472272.

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, 16353 + ... + 18175.

Almost surely, 2^31472272 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 31472272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33247872).

31472272 is an abundant number, since it is smaller than the sum of its proper divisors (35023472).

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

31472272 is a wasteful number, since it uses less digits than its factorization.

31472272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927 (or 1921 counting only the distinct ones).

The product of its digits is 4704, while the sum is 28.

The square root of 31472272 is about 5610.0153297473. The cubic root of 31472272 is about 315.7252860028.

Adding to 31472272 its reverse (27227413), we get a palindrome (58699685).

The spelling of 31472272 in words is "thirty-one million, four hundred seventy-two thousand, two hundred seventy-two".