218909094 has 32 divisors (see below), whose sum is σ = 450701280. Its totient is φ = 70831872.

The previous prime is 218909083. The next prime is 218909107. The reversal of 218909094 is 490909812.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125452 + ... + 127184.

It is an arithmetic number, because the mean of its divisors is an integer number (14084415).

Almost surely, 2^218909094 is an apocalyptic number.

218909094 is an abundant number, since it is smaller than the sum of its proper divisors (231792186).

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

218909094 is a wasteful number, since it uses less digits than its factorization.

218909094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 218909094 is about 14795.5768390421. The cubic root of 218909094 is about 602.6816027121.

The spelling of 218909094 in words is "two hundred eighteen million, nine hundred nine thousand, ninety-four".