38686131 has 48 divisors (see below), whose sum is σ = 63584352. Its totient is φ = 22464000.

The previous prime is 38686121. The next prime is 38686157. The reversal of 38686131 is 13168683.

38686131 is a `hidden beast` number, since 38 + 6 + 8 + 613 + 1 = 666.

It is not a de Polignac number, because 38686131 - 2⁵ = 38686099 is a prime.

It is a super-2 number, since 2×38686131² = 2993233463498322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38686121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 382981 + ... + 383081.

It is an arithmetic number, because the mean of its divisors is an integer number (1324674).

Almost surely, 2^38686131 is an apocalyptic number.

38686131 is a deficient number, since it is larger than the sum of its proper divisors (24898221).

38686131 is a wasteful number, since it uses less digits than its factorization.

38686131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 241 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 38686131 is about 6219.8176018272. The cubic root of 38686131 is about 338.2089525299.

It can be divided in two parts, 3868 and 6131, that added together give a palindrome (9999).

The spelling of 38686131 in words is "thirty-eight million, six hundred eighty-six thousand, one hundred thirty-one".