1169665920 has 448 divisors, whose sum is σ = 4414845600. Its totient is φ = 295612416.

The previous prime is 1169665891. The next prime is 1169665921. The reversal of 1169665920 is 295669611.

It is a happy number.

1169665920 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1169665921) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 10730826 + ... + 10730934.

It is a vampire number, since it can be written as 19620 ⋅ 59616 (with its own digits).

Almost surely, 2^1169665920 is an apocalyptic number.

1169665920 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 1169665920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207422800).

1169665920 is an abundant number, since it is smaller than the sum of its proper divisors (3245179680).

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

1169665920 is an equidigital number, since it uses as much as digits as its factorization.

1169665920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1169665920 is about 34200.3789452690. The cubic root of 1169665920 is about 1053.6279401685.

The spelling of 1169665920 in words is "one billion, one hundred sixty-nine million, six hundred sixty-five thousand, nine hundred twenty".