31732480 has 72 divisors (see below), whose sum is σ = 81898992. Its totient is φ = 11710464.

The previous prime is 31732457. The next prime is 31732517. The reversal of 31732480 is 8423713.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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, 15687 + ... + 17593.

It is an arithmetic number, because the mean of its divisors is an integer number (1137486).

Almost surely, 2^31732480 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 31732480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40949496).

31732480 is an abundant number, since it is smaller than the sum of its proper divisors (50166512).

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

31732480 is a wasteful number, since it uses less digits than its factorization.

31732480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 31732480 is about 5633.1589716606. The cubic root of 31732480 is about 316.5930219633.

The spelling of 31732480 in words is "thirty-one million, seven hundred thirty-two thousand, four hundred eighty".