31589472 has 48 divisors (see below), whose sum is σ = 83607552. Its totient is φ = 10442880.

The previous prime is 31589461. The next prime is 31589473. The reversal of 31589472 is 27498513.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 31589472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31589473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10897 + ... + 13487.

It is an arithmetic number, because the mean of its divisors is an integer number (1741824).

Almost surely, 2^31589472 is an apocalyptic number.

31589472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31589472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41803776).

31589472 is an abundant number, since it is smaller than the sum of its proper divisors (52018080).

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

31589472 is a wasteful number, since it uses less digits than its factorization.

31589472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731 (or 2723 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 31589472 is about 5620.4512274372. The cubic root of 31589472 is about 316.1167116819.

The spelling of 31589472 in words is "thirty-one million, five hundred eighty-nine thousand, four hundred seventy-two".