1115345220 has 192 divisors, whose sum is σ = 3711052800. Its totient is φ = 247242240.

The previous prime is 1115345219. The next prime is 1115345243. The reversal of 1115345220 is 225435111.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 362127 + ... + 365193.

It is an arithmetic number, because the mean of its divisors is an integer number (19328400).

Almost surely, 2^1115345220 is an apocalyptic number.

1115345220 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 1115345220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1855526400).

1115345220 is an abundant number, since it is smaller than the sum of its proper divisors (2595707580).

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

1115345220 is a wasteful number, since it uses less digits than its factorization.

1115345220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138 (or 3136 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1115345220 is about 33396.7845757642. The cubic root of 1115345220 is about 1037.0581370937.

The spelling of 1115345220 in words is "one billion, one hundred fifteen million, three hundred forty-five thousand, two hundred twenty".