198122406 has 16 divisors (see below), whose sum is σ = 396398448. Its totient is φ = 66015200.

The previous prime is 198122401. The next prime is 198122423. The reversal of 198122406 is 604221891.

It is a super-3 number, since 3×198122406³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198122401) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16876 + ... + 26096.

It is an arithmetic number, because the mean of its divisors is an integer number (24774903).

Almost surely, 2^198122406 is an apocalyptic number.

198122406 is an abundant number, since it is smaller than the sum of its proper divisors (198276042).

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

198122406 is a wasteful number, since it uses less digits than its factorization.

198122406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12807.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 198122406 is about 14075.5961152628. The cubic root of 198122406 is about 582.9677514141.

The spelling of 198122406 in words is "one hundred ninety-eight million, one hundred twenty-two thousand, four hundred six".