2218376394 has 36 divisors (see below), whose sum is σ = 5177893266. Its totient is φ = 682355664.

The previous prime is 2218376389. The next prime is 2218376411. The reversal of 2218376394 is 4936738122.

2218376394 is a `hidden beast` number, since 2 + 2 + 1 + 8 + 3 + 7 + 639 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2133054225 + 85322169 = 46185^2 + 9237^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 718947 + ... + 722025.

Almost surely, 2^2218376394 is an apocalyptic number.

2218376394 is an abundant number, since it is smaller than the sum of its proper divisors (2959516872).

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

2218376394 is an equidigital number, since it uses as much as digits as its factorization.

2218376394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6179 (or 3097 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 2218376394 is about 47099.6432470566. The cubic root of 2218376394 is about 1304.2026502803.

The spelling of 2218376394 in words is "two billion, two hundred eighteen million, three hundred seventy-six thousand, three hundred ninety-four".