31799942 has 8 divisors (see below), whose sum is σ = 48412056. Its totient is φ = 15662592.

The previous prime is 31799941. The next prime is 31799993. The reversal of 31799942 is 24999713.

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

It is a super-2 number, since 2×31799942² = 2022472622406728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31799893 and 31799902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31799941) 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 3 ways as a sum of consecutive naturals, for example, 118523 + ... + 118790.

It is an arithmetic number, because the mean of its divisors is an integer number (6051507).

Almost surely, 2^31799942 is an apocalyptic number.

31799942 is a deficient number, since it is larger than the sum of its proper divisors (16612114).

31799942 is a wasteful number, since it uses less digits than its factorization.

31799942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237382.

The product of its digits is 122472, while the sum is 44.

The square root of 31799942 is about 5639.1437293263. The cubic root of 31799942 is about 316.8172179173.

The spelling of 31799942 in words is "thirty-one million, seven hundred ninety-nine thousand, nine hundred forty-two".