198865772 has 12 divisors (see below), whose sum is σ = 397731600. Its totient is φ = 85228176.

The previous prime is 198865757. The next prime is 198865781. The reversal of 198865772 is 277568891.

198865772 is an admirable 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, 3551147 + ... + 3551202.

It is an arithmetic number, because the mean of its divisors is an integer number (33144300).

Almost surely, 2^198865772 is an apocalyptic number.

It is an amenable number.

198865772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

198865772 is a wasteful number, since it uses less digits than its factorization.

198865772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102360 (or 7102358 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 53.

The square root of 198865772 is about 14101.9775918131. The cubic root of 198865772 is about 583.6959502861.

The spelling of 198865772 in words is "one hundred ninety-eight million, eight hundred sixty-five thousand, seven hundred seventy-two".