1118231905 has 16 divisors (see below), whose sum is σ = 1535030784. Its totient is φ = 766059840.

The previous prime is 1118231893. The next prime is 1118231927. The reversal of 1118231905 is 5091328111.

It is a de Polignac number, because none of the positive numbers 2^k-1118231905 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23640 + ... + 52870.

It is an arithmetic number, because the mean of its divisors is an integer number (95939424).

Almost surely, 2^1118231905 is an apocalyptic number.

It is an amenable number.

1118231905 is a deficient number, since it is larger than the sum of its proper divisors (416798879).

1118231905 is a wasteful number, since it uses less digits than its factorization.

1118231905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30336.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 1118231905 is about 33439.9746560909. The cubic root of 1118231905 is about 1037.9520549999.

The spelling of 1118231905 in words is "one billion, one hundred eighteen million, two hundred thirty-one thousand, nine hundred five".