31990839406 has 8 divisors (see below), whose sum is σ = 48019749984. Its totient is φ = 15984256080.

The previous prime is 31990839383. The next prime is 31990839407. The reversal of 31990839406 is 60493809913.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31990839407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5578230 + ... + 5583961.

It is an arithmetic number, because the mean of its divisors is an integer number (6002468748).

Almost surely, 2^31990839406 is an apocalyptic number.

31990839406 is a deficient number, since it is larger than the sum of its proper divisors (16028910578).

31990839406 is a wasteful number, since it uses less digits than its factorization.

31990839406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11163626.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 31990839406 in words is "thirty-one billion, nine hundred ninety million, eight hundred thirty-nine thousand, four hundred six".