1158855720 has 96 divisors (see below), whose sum is σ = 3821398560. Its totient is φ = 280931200.

The previous prime is 1158855703. The next prime is 1158855749. The reversal of 1158855720 is 275588511.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25386 + ... + 54425.

It is an arithmetic number, because the mean of its divisors is an integer number (39806235).

Almost surely, 2^1158855720 is an apocalyptic number.

1158855720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1158855720 is an abundant number, since it is smaller than the sum of its proper divisors (2662542840).

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

1158855720 is a wasteful number, since it uses less digits than its factorization.

1158855720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79847 (or 79832 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 42.

The square root of 1158855720 is about 34041.9699782489. The cubic root of 1158855720 is about 1050.3719679861.

The spelling of 1158855720 in words is "one billion, one hundred fifty-eight million, eight hundred fifty-five thousand, seven hundred twenty".