31420944 has 120 divisors (see below), whose sum is σ = 94011840. Its totient is φ = 9774336.

The previous prime is 31420903. The next prime is 31420951. The reversal of 31420944 is 44902413.

It is a super-2 number, since 2×31420944² = 1974551443702272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175447 + ... + 175625.

It is an arithmetic number, because the mean of its divisors is an integer number (783432).

Almost surely, 2^31420944 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 31420944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47005920).

31420944 is an abundant number, since it is smaller than the sum of its proper divisors (62590896).

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

31420944 is a wasteful number, since it uses less digits than its factorization.

31420944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 260 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 31420944 is about 5605.4387874635. The cubic root of 31420944 is about 315.5535542498.

The spelling of 31420944 in words is "thirty-one million, four hundred twenty thousand, nine hundred forty-four".