1198885812 has 12 divisors (see below), whose sum is σ = 2797400256. Its totient is φ = 399628600.

The previous prime is 1198885777. The next prime is 1198885829. The reversal of 1198885812 is 2185888911.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 49953564 + ... + 49953587.

It is an arithmetic number, because the mean of its divisors is an integer number (233116688).

Almost surely, 2^1198885812 is an apocalyptic number.

1198885812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1198885812 is an abundant number, since it is smaller than the sum of its proper divisors (1598514444).

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

1198885812 is a wasteful number, since it uses less digits than its factorization.

1198885812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99907158 (or 99907156 counting only the distinct ones).

The product of its digits is 368640, while the sum is 51.

The square root of 1198885812 is about 34624.9304981252. The cubic root of 1198885812 is about 1062.3295780550.

The spelling of 1198885812 in words is "one billion, one hundred ninety-eight million, eight hundred eighty-five thousand, eight hundred twelve".