31000038 has 8 divisors (see below), whose sum is σ = 62000088. Its totient is φ = 10333344.

The previous prime is 31000003. The next prime is 31000063. The reversal of 31000038 is 83000013.

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

31000038 is an admirable number.

It is a super-2 number, since 2×31000038² = 1922004712002888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30999990 and 31000026.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2583331 + ... + 2583342.

It is an arithmetic number, because the mean of its divisors is an integer number (7750011).

Almost surely, 2^31000038 is an apocalyptic number.

31000038 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31000038 is a wasteful number, since it uses less digits than its factorization.

31000038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5166678.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31000038 is about 5567.7677753297. The cubic root of 31000038 is about 314.1381935966.

The spelling of 31000038 in words is "thirty-one million, thirty-eight", and thus it is an aban number and an uban number.