1158417998 has 8 divisors (see below), whose sum is σ = 1737774192. Its totient is φ = 579159936.

The previous prime is 1158417929. The next prime is 1158418003. The reversal of 1158417998 is 8997148511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24911 + ... + 54197.

It is an arithmetic number, because the mean of its divisors is an integer number (217221774).

Almost surely, 2^1158417998 is an apocalyptic number.

1158417998 is a deficient number, since it is larger than the sum of its proper divisors (579356194).

1158417998 is a wasteful number, since it uses less digits than its factorization.

1158417998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49066.

The product of its digits is 725760, while the sum is 53.

The square root of 1158417998 is about 34035.5402190122. The cubic root of 1158417998 is about 1050.2397027953.

The spelling of 1158417998 in words is "one billion, one hundred fifty-eight million, four hundred seventeen thousand, nine hundred ninety-eight".