1118814840 has 384 divisors, whose sum is σ = 4333754880. Its totient is φ = 246758400.

The previous prime is 1118814833. The next prime is 1118814841. The reversal of 1118814840 is 484188111.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1118814795 and 1118814804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118814841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5302335 + ... + 5302545.

It is an arithmetic number, because the mean of its divisors is an integer number (11285820).

Almost surely, 2^1118814840 is an apocalyptic number.

1118814840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1118814840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2166877440).

1118814840 is an abundant number, since it is smaller than the sum of its proper divisors (3214940040).

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

1118814840 is a wasteful number, since it uses less digits than its factorization.

1118814840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 36.

The square root of 1118814840 is about 33448.6896604336. The cubic root of 1118814840 is about 1038.1323853559.

The spelling of 1118814840 in words is "one billion, one hundred eighteen million, eight hundred fourteen thousand, eight hundred forty".