1155445312 has 28 divisors (see below), whose sum is σ = 2620385920. Its totient is φ = 495190656.

The previous prime is 1155445301. The next prime is 1155445363. The reversal of 1155445312 is 2135445511.

It is a tau number, because it is divible by the number of its divisors (28).

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 3 ways as a sum of consecutive naturals, for example, 1289112 + ... + 1290007.

Almost surely, 2^1155445312 is an apocalyptic number.

It is an amenable number.

1155445312 is an abundant number, since it is smaller than the sum of its proper divisors (1464940608).

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

1155445312 is an equidigital number, since it uses as much as digits as its factorization.

1155445312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579138 (or 2579128 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 1155445312 is about 33991.8418447721. The cubic root of 1155445312 is about 1049.3405721920.

The spelling of 1155445312 in words is "one billion, one hundred fifty-five million, four hundred forty-five thousand, three hundred twelve".