199280020 has 24 divisors (see below), whose sum is σ = 422196264. Its totient is φ = 79005696.

The previous prime is 199280009. The next prime is 199280021. The reversal of 199280020 is 20082991.

It can be written as a sum of positive squares in 4 ways, for example, as 695556 + 198584464 = 834^2 + 14092^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199280021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41829 + ... + 46348.

It is an arithmetic number, because the mean of its divisors is an integer number (17591511).

Almost surely, 2^199280020 is an apocalyptic number.

199280020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199280020 is an abundant number, since it is smaller than the sum of its proper divisors (222916244).

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

199280020 is a wasteful number, since it uses less digits than its factorization.

199280020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88299 (or 88297 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 199280020 is about 14116.6575364000. The cubic root of 199280020 is about 584.1009591204.

The spelling of 199280020 in words is "one hundred ninety-nine million, two hundred eighty thousand, twenty".