1138587766 has 16 divisors (see below), whose sum is σ = 1725419520. Its totient is φ = 563469480.

The previous prime is 1138587757. The next prime is 1138587811. The reversal of 1138587766 is 6677858311.

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, 106401 + ... + 116611.

It is an arithmetic number, because the mean of its divisors is an integer number (107838720).

Almost surely, 2^1138587766 is an apocalyptic number.

1138587766 is a deficient number, since it is larger than the sum of its proper divisors (586831754).

1138587766 is a wasteful number, since it uses less digits than its factorization.

1138587766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10779.

The product of its digits is 1693440, while the sum is 52.

The square root of 1138587766 is about 33742.9661707444. The cubic root of 1138587766 is about 1044.2123796630.

The spelling of 1138587766 in words is "one billion, one hundred thirty-eight million, five hundred eighty-seven thousand, seven hundred sixty-six".