1138442279 has 16 divisors (see below), whose sum is σ = 1253109312. Its totient is φ = 1027772928.

The previous prime is 1138442273. The next prime is 1138442317. The reversal of 1138442279 is 9722448311.

It is a de Polignac number, because none of the positive numbers 2^k-1138442279 is a prime.

It is a super-2 number, since 2×1138442279² = 2592101645229427682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) 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 (1138442273) 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, 229742 + ... + 234644.

It is an arithmetic number, because the mean of its divisors is an integer number (78319332).

Almost surely, 2^1138442279 is an apocalyptic number.

1138442279 is a deficient number, since it is larger than the sum of its proper divisors (114667033).

1138442279 is a wasteful number, since it uses less digits than its factorization.

1138442279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306.

The product of its digits is 96768, while the sum is 41.

The square root of 1138442279 is about 33740.8102896181. The cubic root of 1138442279 is about 1044.1679018159.

The spelling of 1138442279 in words is "one billion, one hundred thirty-eight million, four hundred forty-two thousand, two hundred seventy-nine".