31390982 has 8 divisors (see below), whose sum is σ = 53813136. Its totient is φ = 13453272.

The previous prime is 31390979. The next prime is 31390987. The reversal of 31390982 is 28909313.

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 (31390987) 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, 1121093 + ... + 1121120.

It is an arithmetic number, because the mean of its divisors is an integer number (6726642).

Almost surely, 2^31390982 is an apocalyptic number.

31390982 is a deficient number, since it is larger than the sum of its proper divisors (22422154).

31390982 is a wasteful number, since it uses less digits than its factorization.

31390982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242222.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 31390982 is about 5602.7655671106. The cubic root of 31390982 is about 315.4532217837.

It can be divided in two parts, 3139098 and 2, that multiplied together give a triangular number (6278196 = T₃₅₄₃).

The spelling of 31390982 in words is "thirty-one million, three hundred ninety thousand, nine hundred eighty-two".