38128911 has 8 divisors (see below), whose sum is σ = 51003264. Its totient is φ = 25336920.

The previous prime is 38128903. The next prime is 38128913. The reversal of 38128911 is 11982183.

38128911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38128911 - 2³ = 38128903 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38128913) 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, 19501 + ... + 21366.

It is an arithmetic number, because the mean of its divisors is an integer number (6375408).

Almost surely, 2^38128911 is an apocalyptic number.

38128911 is a deficient number, since it is larger than the sum of its proper divisors (12874353).

38128911 is a wasteful number, since it uses less digits than its factorization.

38128911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41181.

The product of its digits is 3456, while the sum is 33.

The square root of 38128911 is about 6174.8612130152. The cubic root of 38128911 is about 336.5772831801.

It can be divided in two parts, 381 and 28911, that added together give a palindrome (29292).

The spelling of 38128911 in words is "thirty-eight million, one hundred twenty-eight thousand, nine hundred eleven".