1118987136 has 80 divisors (see below), whose sum is σ = 3330118440. Its totient is φ = 372992256.

The previous prime is 1118987131. The next prime is 1118987137. The reversal of 1118987136 is 6317898111.

It is a junction number, because it is equal to n+sod(n) for n = 1118987091 and 1118987100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118987131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 43596 + ... + 64331.

Almost surely, 2^1118987136 is an apocalyptic number.

1118987136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1118987136 is an abundant number, since it is smaller than the sum of its proper divisors (2211131304).

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

1118987136 is an equidigital number, since it uses as much as digits as its factorization.

1118987136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107953 (or 107932 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 1118987136 is about 33451.2650881846. The cubic root of 1118987136 is about 1038.1856729569.

The spelling of 1118987136 in words is "one billion, one hundred eighteen million, nine hundred eighty-seven thousand, one hundred thirty-six".