1155441000 has 128 divisors (see below), whose sum is σ = 4120047360. Its totient is φ = 264096000.

The previous prime is 1155440983. The next prime is 1155441019. The reversal of 1155441000 is 1445511.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6511 + ... + 48510.

It is an arithmetic number, because the mean of its divisors is an integer number (32187870).

Almost surely, 2^1155441000 is an apocalyptic number.

1155441000 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 1155441000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2060023680).

1155441000 is an abundant number, since it is smaller than the sum of its proper divisors (2964606360).

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

1155441000 is a wasteful number, since it uses less digits than its factorization.

1155441000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55052 (or 55038 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1155441000 is about 33991.7784177292. The cubic root of 1155441000 is about 1049.3392668476.

Adding to 1155441000 its reverse (1445511), we get a palindrome (1156886511).

The spelling of 1155441000 in words is "one billion, one hundred fifty-five million, four hundred forty-one thousand".