38779139 has 6 divisors (see below), whose sum is σ = 45110484. Its totient is φ = 33239220.

The previous prime is 38779129. The next prime is 38779141. The reversal of 38779139 is 93197783.

38779139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38779139 - 2⁴ = 38779123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38779093 and 38779102.

It is not an unprimeable number, because it can be changed into a prime (38779129) 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 5 ways as a sum of consecutive naturals, for example, 395657 + ... + 395754.

It is an arithmetic number, because the mean of its divisors is an integer number (7518414).

Almost surely, 2^38779139 is an apocalyptic number.

38779139 is a deficient number, since it is larger than the sum of its proper divisors (6331345).

38779139 is an equidigital number, since it uses as much as digits as its factorization.

38779139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791425 (or 791418 counting only the distinct ones).

The product of its digits is 285768, while the sum is 47.

The square root of 38779139 is about 6227.2898599632. The cubic root of 38779139 is about 338.4797727819.

The spelling of 38779139 in words is "thirty-eight million, seven hundred seventy-nine thousand, one hundred thirty-nine".