31294480 has 160 divisors (see below), whose sum is σ = 89994240. Its totient is φ = 9891840.

The previous prime is 31294477. The next prime is 31294493. The reversal of 31294480 is 8449213.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 665817 + ... + 665863.

It is an arithmetic number, because the mean of its divisors is an integer number (562464).

Almost surely, 2^31294480 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 31294480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44997120).

31294480 is an abundant number, since it is smaller than the sum of its proper divisors (58699760).

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

31294480 is a wasteful number, since it uses less digits than its factorization.

31294480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 31294480 is about 5594.1469412235. The cubic root of 31294480 is about 315.1296350613.

The spelling of 31294480 in words is "thirty-one million, two hundred ninety-four thousand, four hundred eighty".