1138742267 has 16 divisors (see below), whose sum is σ = 1245666240. Its totient is φ = 1034698752.

The previous prime is 1138742239. The next prime is 1138742281. The reversal of 1138742267 is 7622478311.

It is a cyclic number.

It is not a de Polignac number, because 1138742267 - 2²⁰ = 1137693691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138742207) 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, 241034 + ... + 245712.

It is an arithmetic number, because the mean of its divisors is an integer number (77854140).

Almost surely, 2^1138742267 is an apocalyptic number.

1138742267 is a deficient number, since it is larger than the sum of its proper divisors (106923973).

1138742267 is a wasteful number, since it uses less digits than its factorization.

1138742267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4982.

The product of its digits is 112896, while the sum is 41.

The square root of 1138742267 is about 33745.2554739181. The cubic root of 1138742267 is about 1044.2596090949.

The spelling of 1138742267 in words is "one billion, one hundred thirty-eight million, seven hundred forty-two thousand, two hundred sixty-seven".