31869842 has 16 divisors (see below), whose sum is σ = 48837600. Its totient is φ = 15594432.

The previous prime is 31869797. The next prime is 31869847. The reversal of 31869842 is 24896813.

It is a self number, because there is not a number n which added to its sum of digits gives 31869842.

It is not an unprimeable number, because it can be changed into a prime (31869847) 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 7 ways as a sum of consecutive naturals, for example, 17909 + ... + 19607.

It is an arithmetic number, because the mean of its divisors is an integer number (3052350).

Almost surely, 2^31869842 is an apocalyptic number.

31869842 is a deficient number, since it is larger than the sum of its proper divisors (16967758).

31869842 is a wasteful number, since it uses less digits than its factorization.

31869842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897.

The product of its digits is 82944, while the sum is 41.

The square root of 31869842 is about 5645.3380766788. The cubic root of 31869842 is about 317.0491818327.

The spelling of 31869842 in words is "thirty-one million, eight hundred sixty-nine thousand, eight hundred forty-two".