1164988818 has 240 divisors, whose sum is σ = 3284903160. Its totient is φ = 306561024.

The previous prime is 1164988793. The next prime is 1164988837. The reversal of 1164988818 is 8188894611.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 956850489 + 208138329 = 30933^2 + 14427^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 12010146 + ... + 12010242.

Almost surely, 2^1164988818 is an apocalyptic number.

1164988818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1164988818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642451580).

1164988818 is an abundant number, since it is smaller than the sum of its proper divisors (2119914342).

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

1164988818 is a wasteful number, since it uses less digits than its factorization.

1164988818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 215 counting only the distinct ones).

The product of its digits is 884736, while the sum is 54.

The square root of 1164988818 is about 34131.9325265945. The cubic root of 1164988818 is about 1052.2216957966.

It can be divided in two parts, 116498 and 8818, that added together give a square (125316 = 354²).

The spelling of 1164988818 in words is "one billion, one hundred sixty-four million, nine hundred eighty-eight thousand, eight hundred eighteen".