1138805588 has 24 divisors (see below), whose sum is σ = 2115067752. Its totient is φ = 534657024.

The previous prime is 1138805587. The next prime is 1138805597. The reversal of 1138805588 is 8855088311.

It can be written as a sum of positive squares in 4 ways, for example, as 283024 + 1138522564 = 532^2 + 33742^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138805587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10106 + ... + 48782.

It is an arithmetic number, because the mean of its divisors is an integer number (88127823).

Almost surely, 2^1138805588 is an apocalyptic number.

It is an amenable number.

1138805588 is a deficient number, since it is larger than the sum of its proper divisors (976262164).

1138805588 is a wasteful number, since it uses less digits than its factorization.

1138805588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39131 (or 39129 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 47.

The square root of 1138805588 is about 33746.1936816584. The cubic root of 1138805588 is about 1044.2789644659.

The spelling of 1138805588 in words is "one billion, one hundred thirty-eight million, eight hundred five thousand, five hundred eighty-eight".