1138587777 has 12 divisors (see below), whose sum is σ = 1647524580. Its totient is φ = 757721088.

The previous prime is 1138587757. The next prime is 1138587811. The reversal of 1138587777 is 7777858311.

It can be written as a sum of positive squares in 2 ways, for example, as 454712976 + 683874801 = 21324^2 + 26151^2 .

It is not a de Polignac number, because 1138587777 - 2⁶ = 1138587713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138587727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106048 + ... + 116289.

It is an arithmetic number, because the mean of its divisors is an integer number (137293715).

Almost surely, 2^1138587777 is an apocalyptic number.

It is an amenable number.

1138587777 is a deficient number, since it is larger than the sum of its proper divisors (508936803).

1138587777 is a wasteful number, since it uses less digits than its factorization.

1138587777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222912 (or 222909 counting only the distinct ones).

The product of its digits is 2304960, while the sum is 54.

The square root of 1138587777 is about 33742.9663337413. The cubic root of 1138587777 is about 1044.2123830258.

The spelling of 1138587777 in words is "one billion, one hundred thirty-eight million, five hundred eighty-seven thousand, seven hundred seventy-seven".