1155323320 has 32 divisors (see below), whose sum is σ = 2610849600. Its totient is φ = 460107648.

The previous prime is 1155323317. The next prime is 1155323339. The reversal of 1155323320 is 233235511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53904 + ... + 72223.

It is an arithmetic number, because the mean of its divisors is an integer number (81589050).

Almost surely, 2^1155323320 is an apocalyptic number.

1155323320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155323320 is an abundant number, since it is smaller than the sum of its proper divisors (1455526280).

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

1155323320 is a wasteful number, since it uses less digits than its factorization.

1155323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126367 (or 126363 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1155323320 is about 33990.0473668396. The cubic root of 1155323320 is about 1049.3036410742.

Adding to 1155323320 its reverse (233235511), we get a palindrome (1388558831).

The spelling of 1155323320 in words is "one billion, one hundred fifty-five million, three hundred twenty-three thousand, three hundred twenty".