31138876 has 12 divisors (see below), whose sum is σ = 54923008. Its totient is φ = 15446592.

The previous prime is 31138873. The next prime is 31138879. The reversal of 31138876 is 67883113.

It is an interprime number because it is at equal distance from previous prime (31138873) and next prime (31138879).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31138871) by changing a digit.

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, 30141 + ... + 31156.

Almost surely, 2^31138876 is an apocalyptic number.

It is an amenable number.

31138876 is a deficient number, since it is larger than the sum of its proper divisors (23784132).

31138876 is a wasteful number, since it uses less digits than its factorization.

31138876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61428 (or 61426 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 31138876 is about 5580.2218593887. The cubic root of 31138876 is about 314.6064658087.

The spelling of 31138876 in words is "thirty-one million, one hundred thirty-eight thousand, eight hundred seventy-six".