1165440000 has 220 divisors, whose sum is σ = 3888055424. Its totient is φ = 310272000.

The previous prime is 1165439999. The next prime is 1165440007. The reversal of 1165440000 is 445611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165440007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1919697 + ... + 1920303.

Almost surely, 2^1165440000 is an apocalyptic number.

1165440000 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 1165440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1944027712).

1165440000 is an abundant number, since it is smaller than the sum of its proper divisors (2722615424).

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

1165440000 is an frugal number, since it uses more digits than its factorization.

1165440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1165440000 is about 34138.5412693630. The cubic root of 1165440000 is about 1052.3575146154.

Adding to 1165440000 its reverse (445611), we get a palindrome (1165885611).

The spelling of 1165440000 in words is "one billion, one hundred sixty-five million, four hundred forty thousand".