31982138 has 8 divisors (see below), whose sum is σ = 48005760. Its totient is φ = 15980220.

The previous prime is 31982101. The next prime is 31982147. The reversal of 31982138 is 83128913.

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

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 31982098 and 31982107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1028 + ... + 8063.

It is an arithmetic number, because the mean of its divisors is an integer number (6000720).

Almost surely, 2^31982138 is an apocalyptic number.

31982138 is a deficient number, since it is larger than the sum of its proper divisors (16023622).

31982138 is a wasteful number, since it uses less digits than its factorization.

31982138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10852.

The product of its digits is 10368, while the sum is 35.

The square root of 31982138 is about 5655.2752364496. The cubic root of 31982138 is about 317.4211282377.

The spelling of 31982138 in words is "thirty-one million, nine hundred eighty-two thousand, one hundred thirty-eight".