38138028 has 12 divisors (see below), whose sum is σ = 88988760. Its totient is φ = 12712672.

The previous prime is 38138027. The next prime is 38138041. The reversal of 38138028 is 82083183.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 38138028.

It is not an unprimeable number, because it can be changed into a prime (38138027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589073 + ... + 1589096.

It is an arithmetic number, because the mean of its divisors is an integer number (7415730).

Almost surely, 2^38138028 is an apocalyptic number.

It is an amenable number.

38138028 is an abundant number, since it is smaller than the sum of its proper divisors (50850732).

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

38138028 is a wasteful number, since it uses less digits than its factorization.

38138028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178176 (or 3178174 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 38138028 is about 6175.5994041065. The cubic root of 38138028 is about 336.6041073621.

The spelling of 38138028 in words is "thirty-eight million, one hundred thirty-eight thousand, twenty-eight".