218994844 has 6 divisors (see below), whose sum is σ = 383240984. Its totient is φ = 109497420.

The previous prime is 218994827. The next prime is 218994859. The reversal of 218994844 is 448499812.

It is a congruent number.

It is an unprimeable number.

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, 27374352 + ... + 27374359.

Almost surely, 2^218994844 is an apocalyptic number.

It is an amenable number.

218994844 is a deficient number, since it is larger than the sum of its proper divisors (164246140).

218994844 is a wasteful number, since it uses less digits than its factorization.

218994844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54748715 (or 54748713 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 218994844 is about 14798.4743808272. The cubic root of 218994844 is about 602.7602856028.

The spelling of 218994844 in words is "two hundred eighteen million, nine hundred ninety-four thousand, eight hundred forty-four".