38721164 has 24 divisors (see below), whose sum is σ = 72681840. Its totient is φ = 17993664.

The previous prime is 38721161. The next prime is 38721173. The reversal of 38721164 is 46112783.

38721164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 38721164.

It is not an unprimeable number, because it can be changed into a prime (38721161) 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, 779 + ... + 8834.

It is an arithmetic number, because the mean of its divisors is an integer number (3028410).

Almost surely, 2^38721164 is an apocalyptic number.

It is an amenable number.

38721164 is a deficient number, since it is larger than the sum of its proper divisors (33960676).

38721164 is a wasteful number, since it uses less digits than its factorization.

38721164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9689 (or 9687 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 38721164 is about 6222.6332046811. The cubic root of 38721164 is about 338.3110123567.

The spelling of 38721164 in words is "thirty-eight million, seven hundred twenty-one thousand, one hundred sixty-four".