1138312557 has 24 divisors (see below), whose sum is σ = 1674423296. Its totient is φ = 745065216.

The previous prime is 1138312519. The next prime is 1138312583. The reversal of 1138312557 is 7552138311.

It is a happy number.

1138312557 is a `hidden beast` number, since 1 + 13 + 83 + 12 + 557 = 666.

It is not a de Polignac number, because 1138312557 - 2²⁷ = 1004094829 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 (1138312597) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105738 + ... + 116004.

Almost surely, 2^1138312557 is an apocalyptic number.

It is an amenable number.

1138312557 is a deficient number, since it is larger than the sum of its proper divisors (536110739).

1138312557 is a wasteful number, since it uses less digits than its factorization.

1138312557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10497 (or 10494 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 1138312557 is about 33738.8879040196. The cubic root of 1138312557 is about 1044.1282404014.

The spelling of 1138312557 in words is "one billion, one hundred thirty-eight million, three hundred twelve thousand, five hundred fifty-seven".