1155255320 has 16 divisors (see below), whose sum is σ = 2599324560. Its totient is φ = 462102112.

The previous prime is 1155255317. The next prime is 1155255389. The reversal of 1155255320 is 235525511.

It is a super-2 number, since 2×1155255320² = 2669229708776604800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14440652 + ... + 14440731.

It is an arithmetic number, because the mean of its divisors is an integer number (162457785).

Almost surely, 2^1155255320 is an apocalyptic number.

1155255320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155255320 is an abundant number, since it is smaller than the sum of its proper divisors (1444069240).

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

1155255320 is a wasteful number, since it uses less digits than its factorization.

1155255320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28881394 (or 28881390 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 1155255320 is about 33989.0470593102. The cubic root of 1155255320 is about 1049.2830540385.

The spelling of 1155255320 in words is "one billion, one hundred fifty-five million, two hundred fifty-five thousand, three hundred twenty".