31140938 has 8 divisors (see below), whose sum is σ = 46765632. Its totient is φ = 15552396.

The previous prime is 31140929. The next prime is 31140979. The reversal of 31140938 is 83904113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31140938.

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 3 ways as a sum of consecutive naturals, for example, 6770 + ... + 10397.

It is an arithmetic number, because the mean of its divisors is an integer number (5845704).

Almost surely, 2^31140938 is an apocalyptic number.

31140938 is a deficient number, since it is larger than the sum of its proper divisors (15624694).

31140938 is a wasteful number, since it uses less digits than its factorization.

31140938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18076.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 31140938 is about 5580.4066160093. The cubic root of 31140938 is about 314.6134100136.

The spelling of 31140938 in words is "thirty-one million, one hundred forty thousand, nine hundred thirty-eight".