198322690 has 16 divisors (see below), whose sum is σ = 361283328. Its totient is φ = 78372976.

The previous prime is 198322639. The next prime is 198322693. The reversal of 198322690 is 96223891.

It is a happy number.

It is a super-2 number, since 2×198322690² = 78663778737672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198322693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118642 + ... + 120301.

It is an arithmetic number, because the mean of its divisors is an integer number (22580208).

Almost surely, 2^198322690 is an apocalyptic number.

198322690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198322690 is a deficient number, since it is larger than the sum of its proper divisors (162960638).

198322690 is a wasteful number, since it uses less digits than its factorization.

198322690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239033.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 198322690 is about 14082.7089013442. The cubic root of 198322690 is about 583.1641279761.

It can be divided in two parts, 19832 and 2690, that added together give a palindrome (22522).

The spelling of 198322690 in words is "one hundred ninety-eight million, three hundred twenty-two thousand, six hundred ninety".