1138285279 has 8 divisors (see below), whose sum is σ = 1169689248. Its totient is φ = 1106915040.

The previous prime is 1138285261. The next prime is 1138285283. The reversal of 1138285279 is 9725828311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1138285279 - 2⁹ = 1138284767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138235279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69849 + ... + 84589.

It is an arithmetic number, because the mean of its divisors is an integer number (146211156).

Almost surely, 2^1138285279 is an apocalyptic number.

1138285279 is a deficient number, since it is larger than the sum of its proper divisors (31403969).

1138285279 is a wasteful number, since it uses less digits than its factorization.

1138285279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16865.

The product of its digits is 241920, while the sum is 46.

The square root of 1138285279 is about 33738.4836499805. The cubic root of 1138285279 is about 1044.1198999980.

The spelling of 1138285279 in words is "one billion, one hundred thirty-eight million, two hundred eighty-five thousand, two hundred seventy-nine".