38986931 has 4 divisors (see below), whose sum is σ = 39027264. Its totient is φ = 38946600.

The previous prime is 38986907. The next prime is 38986949. The reversal of 38986931 is 13968983.

38986931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38986931 is a prime.

It is a super-2 number, since 2×38986931² = 3039961577597522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38986231) 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, 18680 + ... + 20661.

It is an arithmetic number, because the mean of its divisors is an integer number (9756816).

Almost surely, 2^38986931 is an apocalyptic number.

38986931 is a deficient number, since it is larger than the sum of its proper divisors (40333).

38986931 is an equidigital number, since it uses as much as digits as its factorization.

38986931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40332.

The product of its digits is 279936, while the sum is 47.

The square root of 38986931 is about 6243.9515533034. The cubic root of 38986931 is about 339.0832599477.

The spelling of 38986931 in words is "thirty-eight million, nine hundred eighty-six thousand, nine hundred thirty-one".