31394392 has 16 divisors (see below), whose sum is σ = 58935600. Its totient is φ = 15678240.

The previous prime is 31394387. The next prime is 31394399. The reversal of 31394392 is 29349313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31394399) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6717 + ... + 10387.

It is an arithmetic number, because the mean of its divisors is an integer number (3683475).

Almost surely, 2^31394392 is an apocalyptic number.

It is an amenable number.

31394392 is a deficient number, since it is larger than the sum of its proper divisors (27541208).

31394392 is a wasteful number, since it uses less digits than its factorization.

31394392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4746 (or 4742 counting only the distinct ones).

The product of its digits is 17496, while the sum is 34.

The square root of 31394392 is about 5603.0698728465. The cubic root of 31394392 is about 315.4646439233.

The spelling of 31394392 in words is "thirty-one million, three hundred ninety-four thousand, three hundred ninety-two".