31298420 has 12 divisors (see below), whose sum is σ = 65726724. Its totient is φ = 12519360.

The previous prime is 31298417. The next prime is 31298431. The reversal of 31298420 is 2489213.

It can be written as a sum of positive squares in 2 ways, for example, as 17205904 + 14092516 = 4148^2 + 3754^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782441 + ... + 782480.

It is an arithmetic number, because the mean of its divisors is an integer number (5477227).

Almost surely, 2^31298420 is an apocalyptic number.

It is an amenable number.

31298420 is an abundant number, since it is smaller than the sum of its proper divisors (34428304).

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

31298420 is a wasteful number, since it uses less digits than its factorization.

31298420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564930 (or 1564928 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 31298420 is about 5594.4990839216. The cubic root of 31298420 is about 315.1428595304.

The spelling of 31298420 in words is "thirty-one million, two hundred ninety-eight thousand, four hundred twenty".