198217722 has 16 divisors (see below), whose sum is σ = 419755392. Its totient is φ = 62185920.

The previous prime is 198217693. The next prime is 198217727. The reversal of 198217722 is 227712891.

It is not an unprimeable number, because it can be changed into a prime (198217727) 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, 971554 + ... + 971757.

It is an arithmetic number, because the mean of its divisors is an integer number (26234712).

Almost surely, 2^198217722 is an apocalyptic number.

198217722 is an abundant number, since it is smaller than the sum of its proper divisors (221537670).

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

198217722 is a wasteful number, since it uses less digits than its factorization.

198217722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943333.

The product of its digits is 28224, while the sum is 39.

The square root of 198217722 is about 14078.9815682811. The cubic root of 198217722 is about 583.0612243446.

The spelling of 198217722 in words is "one hundred ninety-eight million, two hundred seventeen thousand, seven hundred twenty-two".