1198118858 has 4 divisors (see below), whose sum is σ = 1797178290. Its totient is φ = 599059428.

The previous prime is 1198118849. The next prime is 1198118869. The reversal of 1198118858 is 8588118911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1007872009 + 190246849 = 31747^2 + 13793^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 299529713 + ... + 299529716.

Almost surely, 2^1198118858 is an apocalyptic number.

1198118858 is a deficient number, since it is larger than the sum of its proper divisors (599059432).

1198118858 is an equidigital number, since it uses as much as digits as its factorization.

1198118858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599059431.

The product of its digits is 184320, while the sum is 50.

The square root of 1198118858 is about 34613.8535560547. The cubic root of 1198118858 is about 1062.1029977550.

The spelling of 1198118858 in words is "one billion, one hundred ninety-eight million, one hundred eighteen thousand, eight hundred fifty-eight".