1158997008 has 80 divisors (see below), whose sum is σ = 3239237120. Its totient is φ = 354972672.

The previous prime is 1158997001. The next prime is 1158997009. The reversal of 1158997008 is 8007998511.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1158997001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134988 + ... + 143316.

It is an arithmetic number, because the mean of its divisors is an integer number (40490464).

Almost surely, 2^1158997008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1158997008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1619618560).

1158997008 is an abundant number, since it is smaller than the sum of its proper divisors (2080240112).

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

1158997008 is a wasteful number, since it uses less digits than its factorization.

1158997008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8576 (or 8570 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 48.

The square root of 1158997008 is about 34044.0451180526. The cubic root of 1158997008 is about 1050.4146534620.

The spelling of 1158997008 in words is "one billion, one hundred fifty-eight million, nine hundred ninety-seven thousand, eight".