31879036 has 48 divisors (see below), whose sum is σ = 69314560. Its totient is φ = 12519360.

The previous prime is 31879021. The next prime is 31879049. The reversal of 31879036 is 63097813.

It is a junction number, because it is equal to n+sod(n) for n = 31878986 and 31879004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15526 + ... + 17458.

Almost surely, 2^31879036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31879036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34657280).

31879036 is an abundant number, since it is smaller than the sum of its proper divisors (37435524).

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

31879036 is a wasteful number, since it uses less digits than its factorization.

31879036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994 (or 1992 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 31879036 is about 5646.1523181721. The cubic root of 31879036 is about 317.0796669740.

The spelling of 31879036 in words is "thirty-one million, eight hundred seventy-nine thousand, thirty-six".