38691816 has 32 divisors (see below), whose sum is σ = 96885600. Its totient is φ = 12876480.

The previous prime is 38691811. The next prime is 38691841. The reversal of 38691816 is 61819683.

38691816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (38691811) 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 7 ways as a sum of consecutive naturals, for example, 23715 + ... + 25293.

It is an arithmetic number, because the mean of its divisors is an integer number (3027675).

Almost surely, 2^38691816 is an apocalyptic number.

It is an amenable number.

38691816 is an abundant number, since it is smaller than the sum of its proper divisors (58193784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38691816 is a wasteful number, since it uses less digits than its factorization.

38691816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609 (or 2605 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 38691816 is about 6220.2745920096. The cubic root of 38691816 is about 338.2255185331.

The spelling of 38691816 in words is "thirty-eight million, six hundred ninety-one thousand, eight hundred sixteen".