1118128005 has 12 divisors (see below), whose sum is σ = 1938088620. Its totient is φ = 596334912.

The previous prime is 1118127991. The next prime is 1118128007. The reversal of 1118128005 is 5008218111.

It can be written as a sum of positive squares in 2 ways, for example, as 693479556 + 424648449 = 26334^2 + 20607^2 .

It is not a de Polignac number, because 1118128005 - 2⁷ = 1118127877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1118128005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118128007) 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, 12423600 + ... + 12423689.

It is an arithmetic number, because the mean of its divisors is an integer number (161507385).

Almost surely, 2^1118128005 is an apocalyptic number.

1118128005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1118128005 is a deficient number, since it is larger than the sum of its proper divisors (819960615).

1118128005 is a wasteful number, since it uses less digits than its factorization.

1118128005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24847300 (or 24847297 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 27.

The square root of 1118128005 is about 33438.4210901173. The cubic root of 1118128005 is about 1037.9199070592.

The spelling of 1118128005 in words is "one billion, one hundred eighteen million, one hundred twenty-eight thousand, five".