31298480 has 20 divisors (see below), whose sum is σ = 72769152. Its totient is φ = 12519360.

The previous prime is 31298441. The next prime is 31298483. The reversal of 31298480 is 8489213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 31298480.

It is not an unprimeable number, because it can be changed into a prime (31298483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195536 + ... + 195695.

Almost surely, 2^31298480 is an apocalyptic number.

It is an amenable number.

31298480 is an abundant number, since it is smaller than the sum of its proper divisors (41470672).

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

31298480 is a wasteful number, since it uses less digits than its factorization.

31298480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391244 (or 391238 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 31298480 is about 5594.5044463295. The cubic root of 31298480 is about 315.1430609097.

The spelling of 31298480 in words is "thirty-one million, two hundred ninety-eight thousand, four hundred eighty".