1118864780 has 48 divisors (see below), whose sum is σ = 2698133760. Its totient is φ = 385444800.

The previous prime is 1118864779. The next prime is 1118864797. The reversal of 1118864780 is 874688111.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 129656 + ... + 138015.

It is an arithmetic number, because the mean of its divisors is an integer number (56211120).

Almost surely, 2^1118864780 is an apocalyptic number.

1118864780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1118864780 is an abundant number, since it is smaller than the sum of its proper divisors (1579268980).

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

1118864780 is a wasteful number, since it uses less digits than its factorization.

1118864780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267710 (or 267708 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 44.

The square root of 1118864780 is about 33449.4361686412. The cubic root of 1118864780 is about 1038.1478313314.

The spelling of 1118864780 in words is "one billion, one hundred eighteen million, eight hundred sixty-four thousand, seven hundred eighty".