38781872 has 20 divisors (see below), whose sum is σ = 76888680. Its totient is φ = 18939648.

The previous prime is 38781857. The next prime is 38781877. The reversal of 38781872 is 27818783.

38781872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (38781877) 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 3 ways as a sum of consecutive naturals, for example, 27497 + ... + 28872.

It is an arithmetic number, because the mean of its divisors is an integer number (3844434).

Almost surely, 2^38781872 is an apocalyptic number.

It is an amenable number.

38781872 is a deficient number, since it is larger than the sum of its proper divisors (38106808).

38781872 is a wasteful number, since it uses less digits than its factorization.

38781872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56420 (or 56414 counting only the distinct ones).

The product of its digits is 150528, while the sum is 44.

The square root of 38781872 is about 6227.5092934495. The cubic root of 38781872 is about 338.4877241660.

The spelling of 38781872 in words is "thirty-eight million, seven hundred eighty-one thousand, eight hundred seventy-two".