38139147 has 32 divisors (see below), whose sum is σ = 59404800. Its totient is φ = 24149664.

The previous prime is 38139133. The next prime is 38139161. The reversal of 38139147 is 74193183.

It is a happy number.

38139147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (38139133) and next prime (38139161).

It is not a de Polignac number, because 38139147 - 2⁴ = 38139131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38139107) 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 31 ways as a sum of consecutive naturals, for example, 52098 + ... + 52824.

It is an arithmetic number, because the mean of its divisors is an integer number (1856400).

Almost surely, 2^38139147 is an apocalyptic number.

38139147 is a deficient number, since it is larger than the sum of its proper divisors (21265653).

38139147 is a wasteful number, since it uses less digits than its factorization.

38139147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 826 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 38139147 is about 6175.6900019350. The cubic root of 38139147 is about 336.6073994071.

The spelling of 38139147 in words is "thirty-eight million, one hundred thirty-nine thousand, one hundred forty-seven".