31230392 has 16 divisors (see below), whose sum is σ = 60446400. Its totient is φ = 15111360.

The previous prime is 31230391. The next prime is 31230401. The reversal of 31230392 is 29303213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31230391) 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, 62717 + ... + 63212.

It is an arithmetic number, because the mean of its divisors is an integer number (3777900).

Almost surely, 2^31230392 is an apocalyptic number.

It is an amenable number.

31230392 is a deficient number, since it is larger than the sum of its proper divisors (29216008).

31230392 is a wasteful number, since it uses less digits than its factorization.

31230392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125966 (or 125962 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 31230392 is about 5588.4158757201. The cubic root of 31230392 is about 314.9143699384.

The spelling of 31230392 in words is "thirty-one million, two hundred thirty thousand, three hundred ninety-two".