1158915912 has 64 divisors (see below), whose sum is σ = 3612211200. Its totient is φ = 301016640.

The previous prime is 1158915853. The next prime is 1158915913. The reversal of 1158915912 is 2195198511.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1158915913) by changing a digit.

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, 311712 + ... + 315407.

It is an arithmetic number, because the mean of its divisors is an integer number (56440800).

Almost surely, 2^1158915912 is an apocalyptic number.

1158915912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1158915912 is an abundant number, since it is smaller than the sum of its proper divisors (2453295288).

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

1158915912 is a wasteful number, since it uses less digits than its factorization.

1158915912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627146 (or 627142 counting only the distinct ones).

The product of its digits is 32400, while the sum is 42.

The square root of 1158915912 is about 34042.8540519152. The cubic root of 1158915912 is about 1050.3901534236.

The spelling of 1158915912 in words is "one billion, one hundred fifty-eight million, nine hundred fifteen thousand, nine hundred twelve".