31890934 has 8 divisors (see below), whose sum is σ = 48084840. Its totient is φ = 15862656.

The previous prime is 31890919. The next prime is 31890959. The reversal of 31890934 is 43909813.

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 = 31890893 and 31890902.

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, 40924 + ... + 41695.

It is an arithmetic number, because the mean of its divisors is an integer number (6010605).

Almost surely, 2^31890934 is an apocalyptic number.

31890934 is a deficient number, since it is larger than the sum of its proper divisors (16193906).

31890934 is a wasteful number, since it uses less digits than its factorization.

31890934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82814.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 31890934 is about 5647.2058577672. The cubic root of 31890934 is about 317.1191092440.

The spelling of 31890934 in words is "thirty-one million, eight hundred ninety thousand, nine hundred thirty-four".