198215020 has 12 divisors (see below), whose sum is σ = 416251584. Its totient is φ = 79286000.

The previous prime is 198214997. The next prime is 198215041. The reversal of 198215020 is 20512891.

198215020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 198215020.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4955356 + ... + 4955395.

It is an arithmetic number, because the mean of its divisors is an integer number (34687632).

Almost surely, 2^198215020 is an apocalyptic number.

198215020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198215020 is an abundant number, since it is smaller than the sum of its proper divisors (218036564).

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

198215020 is a wasteful number, since it uses less digits than its factorization.

198215020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9910760 (or 9910758 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 198215020 is about 14078.8856093087. The cubic root of 198215020 is about 583.0585750043.

The spelling of 198215020 in words is "one hundred ninety-eight million, two hundred fifteen thousand, twenty".