38791631 has 4 divisors (see below), whose sum is σ = 39338064. Its totient is φ = 38245200.

The previous prime is 38791609. The next prime is 38791661. The reversal of 38791631 is 13619783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13619783 = 1151 ⋅11833.

It is a cyclic number.

It is not a de Polignac number, because 38791631 - 2⁶ = 38791567 is a prime.

It is a super-2 number, since 2×38791631² = 3009581271280322, 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 (38791661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273110 + ... + 273251.

It is an arithmetic number, because the mean of its divisors is an integer number (9834516).

Almost surely, 2^38791631 is an apocalyptic number.

38791631 is a deficient number, since it is larger than the sum of its proper divisors (546433).

38791631 is an equidigital number, since it uses as much as digits as its factorization.

38791631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546432.

The product of its digits is 27216, while the sum is 38.

The square root of 38791631 is about 6228.2927837410. The cubic root of 38791631 is about 338.5161139307.

The spelling of 38791631 in words is "thirty-eight million, seven hundred ninety-one thousand, six hundred thirty-one".