1118985988 has 6 divisors (see below), whose sum is σ = 1958225486. Its totient is φ = 559492992.

The previous prime is 1118985937. The next prime is 1118986021. The reversal of 1118985988 is 8895898111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1049630404 + 69355584 = 32398^2 + 8328^2 .

It is a super-2 number, since 2×1118985988² = 2504259282680672288, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 139873245 + ... + 139873252.

Almost surely, 2^1118985988 is an apocalyptic number.

It is an amenable number.

1118985988 is a deficient number, since it is larger than the sum of its proper divisors (839239498).

1118985988 is a wasteful number, since it uses less digits than its factorization.

1118985988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279746501 (or 279746499 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 58.

The square root of 1118985988 is about 33451.2479288890. The cubic root of 1118985988 is about 1038.1853179223.

The spelling of 1118985988 in words is "one billion, one hundred eighteen million, nine hundred eighty-five thousand, nine hundred eighty-eight".