1159281738 has 24 divisors (see below), whose sum is σ = 2516213700. Its totient is φ = 385744704.

The previous prime is 1159281733. The next prime is 1159281839. The reversal of 1159281738 is 8371829511.

1159281738 is a `hidden beast` number, since 11 + 592 + 8 + 17 + 38 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1100713329 + 58568409 = 33177^2 + 7653^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1159281693 and 1159281702.

It is not an unprimeable number, because it can be changed into a prime (1159281733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46353 + ... + 66836.

Almost surely, 2^1159281738 is an apocalyptic number.

1159281738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1159281738 is an abundant number, since it is smaller than the sum of its proper divisors (1356931962).

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

1159281738 is a wasteful number, since it uses less digits than its factorization.

1159281738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113766 (or 113763 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 1159281738 is about 34048.2266498565. The cubic root of 1159281738 is about 1050.5006646348.

The spelling of 1159281738 in words is "one billion, one hundred fifty-nine million, two hundred eighty-one thousand, seven hundred thirty-eight".