1138742268 has 24 divisors (see below), whose sum is σ = 2668189440. Its totient is φ = 377991600.

The previous prime is 1138742239. The next prime is 1138742281. The reversal of 1138742268 is 8622478311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195658 + ... + 201393.

It is an arithmetic number, because the mean of its divisors is an integer number (111174560).

Almost surely, 2^1138742268 is an apocalyptic number.

It is an amenable number.

1138742268 is an abundant number, since it is smaller than the sum of its proper divisors (1529447172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1138742268 is a wasteful number, since it uses less digits than its factorization.

1138742268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397297 (or 397295 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 1138742268 is about 33745.2554887350. The cubic root of 1138742268 is about 1044.2596094006.

The spelling of 1138742268 in words is "one billion, one hundred thirty-eight million, seven hundred forty-two thousand, two hundred sixty-eight".