194028218 has 4 divisors (see below), whose sum is σ = 291042330. Its totient is φ = 97014108.

The previous prime is 194028217. The next prime is 194028229. The reversal of 194028218 is 812820491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 124255609 + 69772609 = 11147^2 + 8353^2 .

It is not an unprimeable number, because it can be changed into a prime (194028217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48507053 + ... + 48507056.

Almost surely, 2^194028218 is an apocalyptic number.

194028218 is a deficient number, since it is larger than the sum of its proper divisors (97014112).

194028218 is an equidigital number, since it uses as much as digits as its factorization.

194028218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97014111.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 194028218 is about 13929.4012075179. The cubic root of 194028218 is about 578.9241033513.

The spelling of 194028218 in words is "one hundred ninety-four million, twenty-eight thousand, two hundred eighteen".