199618422 has 16 divisors (see below), whose sum is σ = 408974832. Its totient is φ = 64916480.

The previous prime is 199618421. The next prime is 199618457. The reversal of 199618422 is 224816991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199618421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405483 + ... + 405974.

It is an arithmetic number, because the mean of its divisors is an integer number (25560927).

Almost surely, 2^199618422 is an apocalyptic number.

199618422 is an abundant number, since it is smaller than the sum of its proper divisors (209356410).

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

199618422 is a wasteful number, since it uses less digits than its factorization.

199618422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811503.

The product of its digits is 62208, while the sum is 42.

The square root of 199618422 is about 14128.6383632677. The cubic root of 199618422 is about 584.4313972546.

The spelling of 199618422 in words is "one hundred ninety-nine million, six hundred eighteen thousand, four hundred twenty-two".