1118985784 has 16 divisors (see below), whose sum is σ = 2397826800. Its totient is φ = 479565312.

The previous prime is 1118985733. The next prime is 1118985797. The reversal of 1118985784 is 4875898111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9990889 + ... + 9991000.

It is an arithmetic number, because the mean of its divisors is an integer number (149864175).

Almost surely, 2^1118985784 is an apocalyptic number.

1118985784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1118985784 is an abundant number, since it is smaller than the sum of its proper divisors (1278841016).

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

1118985784 is a wasteful number, since it uses less digits than its factorization.

1118985784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19981902 (or 19981898 counting only the distinct ones).

The product of its digits is 645120, while the sum is 52.

The square root of 1118985784 is about 33451.2448796753. The cubic root of 1118985784 is about 1038.1852548325.

The spelling of 1118985784 in words is "one billion, one hundred eighteen million, nine hundred eighty-five thousand, seven hundred eighty-four".