1155103872 has 256 divisors, whose sum is σ = 3495744000. Its totient is φ = 335462400.

The previous prime is 1155103867. The next prime is 1155103891. The reversal of 1155103872 is 2783015511.

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 31 ways as a sum of consecutive naturals, for example, 11436622 + ... + 11436722.

It is an arithmetic number, because the mean of its divisors is an integer number (13655250).

Almost surely, 2^1155103872 is an apocalyptic number.

1155103872 is a gapful number since it is divisible by the number (12) 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 1155103872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1747872000).

1155103872 is an abundant number, since it is smaller than the sum of its proper divisors (2340640128).

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

1155103872 is a wasteful number, since it uses less digits than its factorization.

1155103872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 1155103872 is about 33986.8190921128. The cubic root of 1155103872 is about 1049.2372001734.

The spelling of 1155103872 in words is "one billion, one hundred fifty-five million, one hundred three thousand, eight hundred seventy-two".