31994806 has 4 divisors (see below), whose sum is σ = 47992212. Its totient is φ = 15997402.

The previous prime is 31994773. The next prime is 31994813. The reversal of 31994806 is 60849913.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×31994806² = 2047335221955272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7998700 + ... + 7998703.

It is an arithmetic number, because the mean of its divisors is an integer number (11998053).

Almost surely, 2^31994806 is an apocalyptic number.

31994806 is a deficient number, since it is larger than the sum of its proper divisors (15997406).

31994806 is a wasteful number, since it uses less digits than its factorization.

31994806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15997405.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 31994806 is about 5656.3951417842. The cubic root of 31994806 is about 317.4630324620.

The spelling of 31994806 in words is "thirty-one million, nine hundred ninety-four thousand, eight hundred six".