2218166394 has 8 divisors (see below), whose sum is σ = 4436332800. Its totient is φ = 739388796.

The previous prime is 2218166371. The next prime is 2218166399. The reversal of 2218166394 is 4936618122.

It is a sphenic number, since it is the product of 3 distinct primes.

2218166394 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2218166399) 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 in 3 ways as a sum of consecutive naturals, for example, 184847194 + ... + 184847205.

It is an arithmetic number, because the mean of its divisors is an integer number (554541600).

Almost surely, 2^2218166394 is an apocalyptic number.

2218166394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2218166394 is a wasteful number, since it uses less digits than its factorization.

2218166394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369694404.

The product of its digits is 124416, while the sum is 42.

The square root of 2218166394 is about 47097.4138780464. The cubic root of 2218166394 is about 1304.1614953768.

The spelling of 2218166394 in words is "two billion, two hundred eighteen million, one hundred sixty-six thousand, three hundred ninety-four".