31229394 has 32 divisors (see below), whose sum is σ = 72084480. Its totient is φ = 8834832.

The previous prime is 31229371. The next prime is 31229447. The reversal of 31229394 is 49392213.

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 15 ways as a sum of consecutive naturals, for example, 717 + ... + 7935.

It is an arithmetic number, because the mean of its divisors is an integer number (2252640).

Almost surely, 2^31229394 is an apocalyptic number.

31229394 is an abundant number, since it is smaller than the sum of its proper divisors (40855086).

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

31229394 is a wasteful number, since it uses less digits than its factorization.

31229394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7334.

The product of its digits is 11664, while the sum is 33.

The square root of 31229394 is about 5588.3265831553. The cubic root of 31229394 is about 314.9110154294.

The spelling of 31229394 in words is "thirty-one million, two hundred twenty-nine thousand, three hundred ninety-four".