1115520320 has 56 divisors (see below), whose sum is σ = 2661172224. Its totient is φ = 445395456.

The previous prime is 1115520317. The next prime is 1115520323. The reversal of 1115520320 is 230255111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1115520317) and next prime (1115520323).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1115520292 and 1115520301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115520323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191369 + ... + 197111.

Almost surely, 2^1115520320 is an apocalyptic number.

1115520320 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 1115520320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330586112).

1115520320 is an abundant number, since it is smaller than the sum of its proper divisors (1545651904).

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

1115520320 is an equidigital number, since it uses as much as digits as its factorization.

1115520320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6367 (or 6357 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1115520320 is about 33399.4059827417. The cubic root of 1115520320 is about 1037.1124041119.

Adding to 1115520320 its reverse (230255111), we get a palindrome (1345775431).

The spelling of 1115520320 in words is "one billion, one hundred fifteen million, five hundred twenty thousand, three hundred twenty".