1165818880 has 44 divisors (see below), whose sum is σ = 2796611400. Its totient is φ = 466325504.

The previous prime is 1165818851. The next prime is 1165818883. The reversal of 1165818880 is 888185611.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165818880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165818883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108730 + ... + 118969.

It is an arithmetic number, because the mean of its divisors is an integer number (63559350).

Almost surely, 2^1165818880 is an apocalyptic number.

1165818880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165818880 is an abundant number, since it is smaller than the sum of its proper divisors (1630792520).

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

1165818880 is an equidigital number, since it uses as much as digits as its factorization.

1165818880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227724 (or 227706 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 46.

The square root of 1165818880 is about 34144.0899717652. The cubic root of 1165818880 is about 1052.4715413681.

The spelling of 1165818880 in words is "one billion, one hundred sixty-five million, eight hundred eighteen thousand, eight hundred eighty".