38631811 has 6 divisors (see below), whose sum is σ = 39705540. Its totient is φ = 37586376.

The previous prime is 38631809. The next prime is 38631821. The reversal of 38631811 is 11813683.

38631811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38631811 - 2¹ = 38631809 is a prime.

It is a super-2 number, since 2×38631811² = 2984833642279442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38631821) 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 5 ways as a sum of consecutive naturals, for example, 12741 + ... + 15478.

It is an arithmetic number, because the mean of its divisors is an integer number (6617590).

Almost surely, 2^38631811 is an apocalyptic number.

38631811 is a deficient number, since it is larger than the sum of its proper divisors (1073729).

38631811 is an equidigital number, since it uses as much as digits as its factorization.

38631811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28293 (or 28256 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 38631811 is about 6215.4493803747. The cubic root of 38631811 is about 338.0505829786.

The spelling of 38631811 in words is "thirty-eight million, six hundred thirty-one thousand, eight hundred eleven".