31869938 has 8 divisors (see below), whose sum is σ = 48588780. Its totient is φ = 15673680.

The previous prime is 31869931. The next prime is 31869941. The reversal of 31869938 is 83996813.

It can be written as a sum of positive squares in 2 ways, for example, as 31281649 + 588289 = 5593^2 + 767^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 31869892 and 31869901.

It is not an unprimeable number, because it can be changed into a prime (31869931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130493 + ... + 130736.

Almost surely, 2^31869938 is an apocalyptic number.

31869938 is a deficient number, since it is larger than the sum of its proper divisors (16718842).

31869938 is a wasteful number, since it uses less digits than its factorization.

31869938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261292.

The product of its digits is 279936, while the sum is 47.

The square root of 31869938 is about 5645.3465792633. The cubic root of 31869938 is about 317.0495001764.

The spelling of 31869938 in words is "thirty-one million, eight hundred sixty-nine thousand, nine hundred thirty-eight".