1198871894 has 16 divisors (see below), whose sum is σ = 1962335376. Its totient is φ = 544790400.

The previous prime is 1198871873. The next prime is 1198871957. The reversal of 1198871894 is 4981788911.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125114 + ... + 134354.

It is an arithmetic number, because the mean of its divisors is an integer number (122645961).

Almost surely, 2^1198871894 is an apocalyptic number.

1198871894 is a deficient number, since it is larger than the sum of its proper divisors (763463482).

1198871894 is a wasteful number, since it uses less digits than its factorization.

1198871894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15151.

The product of its digits is 1161216, while the sum is 56.

The square root of 1198871894 is about 34624.7295151890. The cubic root of 1198871894 is about 1062.3254671379.

The spelling of 1198871894 in words is "one billion, one hundred ninety-eight million, eight hundred seventy-one thousand, eight hundred ninety-four".