1155328080 has 80 divisors (see below), whose sum is σ = 3595644864. Its totient is φ = 306872320.

The previous prime is 1155328063. The next prime is 1155328091. The reversal of 1155328080 is 808235511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 52315 + ... + 71045.

Almost surely, 2^1155328080 is an apocalyptic number.

1155328080 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 1155328080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1797822432).

1155328080 is an abundant number, since it is smaller than the sum of its proper divisors (2440316784).

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

1155328080 is a wasteful number, since it uses less digits than its factorization.

1155328080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19004 (or 18998 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 1155328080 is about 33990.1173872642. The cubic root of 1155328080 is about 1049.3050821365.

The spelling of 1155328080 in words is "one billion, one hundred fifty-five million, three hundred twenty-eight thousand, eighty".