38713581 has 12 divisors (see below), whose sum is σ = 57431452. Its totient is φ = 25111296.

The previous prime is 38713567. The next prime is 38713643. The reversal of 38713581 is 18531783.

38713581 is a `hidden beast` number, since 3 + 8 + 71 + 3 + 581 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19660356 + 19053225 = 4434^2 + 4365^2 .

It is not a de Polignac number, because 38713581 - 2⁷ = 38713453 is a prime.

It is a super-2 number, since 2×38713581² = 2997482707687122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38713501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57796 + ... + 58461.

Almost surely, 2^38713581 is an apocalyptic number.

It is an amenable number.

38713581 is a deficient number, since it is larger than the sum of its proper divisors (18717871).

38713581 is a wasteful number, since it uses less digits than its factorization.

38713581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116300 (or 116297 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 38713581 is about 6222.0238668780. The cubic root of 38713581 is about 338.2889264169.

The spelling of 38713581 in words is "thirty-eight million, seven hundred thirteen thousand, five hundred eighty-one".