31797238 has 8 divisors (see below), whose sum is σ = 52031880. Its totient is φ = 14453280.

The previous prime is 31797229. The next prime is 31797313. The reversal of 31797238 is 83279713.

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

It is a super-2 number, since 2×31797238² = 2022128688857288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31797238.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722643 + ... + 722686.

It is an arithmetic number, because the mean of its divisors is an integer number (6503985).

Almost surely, 2^31797238 is an apocalyptic number.

31797238 is a deficient number, since it is larger than the sum of its proper divisors (20234642).

31797238 is a wasteful number, since it uses less digits than its factorization.

31797238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445342.

The product of its digits is 63504, while the sum is 40.

The square root of 31797238 is about 5638.9039715179. The cubic root of 31797238 is about 316.8082378376.

The spelling of 31797238 in words is "thirty-one million, seven hundred ninety-seven thousand, two hundred thirty-eight".