31322940 has 48 divisors (see below), whose sum is σ = 95679360. Its totient is φ = 7593280.

The previous prime is 31322939. The next prime is 31322957. The reversal of 31322940 is 4922313.

It is a super-2 number, since 2×31322940² = 1962253140487200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31322940.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23070 + ... + 24389.

It is an arithmetic number, because the mean of its divisors is an integer number (1993320).

Almost surely, 2^31322940 is an apocalyptic number.

31322940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31322940 is an abundant number, since it is smaller than the sum of its proper divisors (64356420).

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

31322940 is a wasteful number, since it uses less digits than its factorization.

31322940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47482 (or 47480 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31322940 is about 5596.6900932605. The cubic root of 31322940 is about 315.2251350987.

The spelling of 31322940 in words is "thirty-one million, three hundred twenty-two thousand, nine hundred forty".