198864012 has 24 divisors (see below), whose sum is σ = 464550912. Its totient is φ = 66211600.

The previous prime is 198863989. The next prime is 198864059. The reversal of 198864012 is 210468891.

It is a super-2 number, since 2×198864012² = 79093790537472288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837 + ... + 20027.

It is an arithmetic number, because the mean of its divisors is an integer number (19356288).

Almost surely, 2^198864012 is an apocalyptic number.

198864012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

198864012 is an abundant number, since it is smaller than the sum of its proper divisors (265686900).

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

198864012 is a wasteful number, since it uses less digits than its factorization.

198864012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19109 (or 19107 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 198864012 is about 14101.9151890798. The cubic root of 198864012 is about 583.6942283409.

The spelling of 198864012 in words is "one hundred ninety-eight million, eight hundred sixty-four thousand, twelve".