31899742 has 8 divisors (see below), whose sum is σ = 54685296. Its totient is φ = 13671312.

The previous prime is 31899709. The next prime is 31899811. The reversal of 31899742 is 24799813.

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

It is a congruent number.

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, 1139263 + ... + 1139290.

It is an arithmetic number, because the mean of its divisors is an integer number (6835662).

Almost surely, 2^31899742 is an apocalyptic number.

31899742 is a deficient number, since it is larger than the sum of its proper divisors (22785554).

31899742 is a wasteful number, since it uses less digits than its factorization.

31899742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278562.

The product of its digits is 108864, while the sum is 43.

The square root of 31899742 is about 5647.9856586220. The cubic root of 31899742 is about 317.1483017412.

The spelling of 31899742 in words is "thirty-one million, eight hundred ninety-nine thousand, seven hundred forty-two".