198950085 has 12 divisors (see below), whose sum is σ = 344846892. Its totient is φ = 106106688.

The previous prime is 198950057. The next prime is 198950111. The reversal of 198950085 is 580059891.

It can be written as a sum of positive squares in 2 ways, for example, as 65270241 + 133679844 = 8079^2 + 11562^2 .

It is not a de Polignac number, because 198950085 - 2¹⁰ = 198949061 is a prime.

It is a super-2 number, since 2×198950085² = 79162272643014450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4421113 = 198950085 / (1 + 9 + 8 + 9 + 5 + 0 + 0 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 198950085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2210512 + ... + 2210601.

It is an arithmetic number, because the mean of its divisors is an integer number (28737241).

Almost surely, 2^198950085 is an apocalyptic number.

198950085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198950085 is a deficient number, since it is larger than the sum of its proper divisors (145896807).

198950085 is a wasteful number, since it uses less digits than its factorization.

198950085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421124 (or 4421121 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 198950085 is about 14104.9666784434. The cubic root of 198950085 is about 583.7784283697.

The spelling of 198950085 in words is "one hundred ninety-eight million, nine hundred fifty thousand, eighty-five".