1115009280 has 576 divisors, whose sum is σ = 4944844800. Its totient is φ = 231137280.

The previous prime is 1115009279. The next prime is 1115009297. The reversal of 1115009280 is 829005111.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-2 number, since 2×1115009280² = 2486491388972236800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2660911 + ... + 2661329.

It is an arithmetic number, because the mean of its divisors is an integer number (8584800).

Almost surely, 2^1115009280 is an apocalyptic number.

1115009280 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 1115009280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2472422400).

1115009280 is an abundant number, since it is smaller than the sum of its proper divisors (3829835520).

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

1115009280 is a wasteful number, since it uses less digits than its factorization.

1115009280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 1115009280 is about 33391.7546708765. The cubic root of 1115009280 is about 1036.9540066151.

The spelling of 1115009280 in words is "one billion, one hundred fifteen million, nine thousand, two hundred eighty".