31990926 has 32 divisors (see below), whose sum is σ = 71290368. Its totient is φ = 9487040.

The previous prime is 31990909. The next prime is 31990943. The reversal of 31990926 is 62909913.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31990909) and next prime (31990943).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2055 + ... + 8258.

It is an arithmetic number, because the mean of its divisors is an integer number (2227824).

Almost surely, 2^31990926 is an apocalyptic number.

31990926 is an abundant number, since it is smaller than the sum of its proper divisors (39299442).

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

31990926 is a wasteful number, since it uses less digits than its factorization.

31990926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10376.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 31990926 is about 5656.0521567609. The cubic root of 31990926 is about 317.4501990627.

The spelling of 31990926 in words is "thirty-one million, nine hundred ninety thousand, nine hundred twenty-six".