1158312990 has 32 divisors (see below), whose sum is σ = 2782390176. Its totient is φ = 308612480.

The previous prime is 1158312937. The next prime is 1158313007. The reversal of 1158312990 is 992138511.

It is a congruent number.

It is an unprimeable number.

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, 19084 + ... + 51776.

It is an arithmetic number, because the mean of its divisors is an integer number (86949693).

Almost surely, 2^1158312990 is an apocalyptic number.

1158312990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1158312990 is an abundant number, since it is smaller than the sum of its proper divisors (1624077186).

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

1158312990 is a wasteful number, since it uses less digits than its factorization.

1158312990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33884.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 1158312990 is about 34033.9975612622. The cubic root of 1158312990 is about 1050.2079678765.

The spelling of 1158312990 in words is "one billion, one hundred fifty-eight million, three hundred twelve thousand, nine hundred ninety".