1138278039 has 16 divisors (see below), whose sum is σ = 1560380640. Its totient is φ = 737648640.

The previous prime is 1138277999. The next prime is 1138278059. The reversal of 1138278039 is 9308728311.

It is not a de Polignac number, because 1138278039 - 2²⁴ = 1121500823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138278059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17367 + ... + 50775.

It is an arithmetic number, because the mean of its divisors is an integer number (97523790).

Almost surely, 2^1138278039 is an apocalyptic number.

1138278039 is a deficient number, since it is larger than the sum of its proper divisors (422102601).

1138278039 is a wasteful number, since it uses less digits than its factorization.

1138278039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33730.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1138278039 is about 33738.3763539386. The cubic root of 1138278039 is about 1044.1176863045.

The spelling of 1138278039 in words is "one billion, one hundred thirty-eight million, two hundred seventy-eight thousand, thirty-nine".