1115220288 has 448 divisors, whose sum is σ = 3932651520. Its totient is φ = 270950400.

The previous prime is 1115220269. The next prime is 1115220289. The reversal of 1115220288 is 8820225111.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115220289) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15707293 + ... + 15707363.

It is an arithmetic number, because the mean of its divisors is an integer number (8778240).

Almost surely, 2^1115220288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115220288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1966325760).

1115220288 is an abundant number, since it is smaller than the sum of its proper divisors (2817431232).

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

1115220288 is a wasteful number, since it uses less digits than its factorization.

1115220288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 1115220288 is about 33394.9141037973. The cubic root of 1115220288 is about 1037.0194146776.

Adding to 1115220288 its reverse (8820225111), we get a palindrome (9935445399).

The spelling of 1115220288 in words is "one billion, one hundred fifteen million, two hundred twenty thousand, two hundred eighty-eight".