1158580998 has 24 divisors (see below), whose sum is σ = 2536141608. Its totient is φ = 382211712.

The previous prime is 1158580937. The next prime is 1158581009. The reversal of 1158580998 is 8990858511.

1158580998 is a `hidden beast` number, since 1 + 1 + 58 + 580 + 9 + 9 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330036 + ... + 333527.

It is an arithmetic number, because the mean of its divisors is an integer number (105672567).

Almost surely, 2^1158580998 is an apocalyptic number.

1158580998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1158580998 is an abundant number, since it is smaller than the sum of its proper divisors (1377560610).

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

1158580998 is a wasteful number, since it uses less digits than its factorization.

1158580998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663668 (or 663665 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 54.

The square root of 1158580998 is about 34037.9346905772. The cubic root of 1158580998 is about 1050.2889599267.

The spelling of 1158580998 in words is "one billion, one hundred fifty-eight million, five hundred eighty thousand, nine hundred ninety-eight".