31941990 has 24 divisors (see below), whose sum is σ = 83049408. Its totient is φ = 8517840.

The previous prime is 31941971. The next prime is 31942007. The reversal of 31941990 is 9914913.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177366 + ... + 177545.

It is an arithmetic number, because the mean of its divisors is an integer number (3460392).

Almost surely, 2^31941990 is an apocalyptic number.

31941990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31941990 is an abundant number, since it is smaller than the sum of its proper divisors (51107418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31941990 is a wasteful number, since it uses less digits than its factorization.

31941990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354924 (or 354921 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 31941990 is about 5651.7245155793. The cubic root of 31941990 is about 317.2882503197.

It can be divided in two parts, 3194 and 1990, that added together give a square (5184 = 72²).

The spelling of 31941990 in words is "thirty-one million, nine hundred forty-one thousand, nine hundred ninety".