218484812 has 24 divisors (see below), whose sum is σ = 470583456. Its totient is φ = 86433408.

The previous prime is 218484793. The next prime is 218484823.

218484812 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×218484812² = 95471226149350688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299753 + ... + 300480.

It is an arithmetic number, because the mean of its divisors is an integer number (19607644).

Almost surely, 2^218484812 is an apocalyptic number.

It is an amenable number.

218484812 is an abundant number, since it is smaller than the sum of its proper divisors (252098644).

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

218484812 is a wasteful number, since it uses less digits than its factorization.

218484812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600257 (or 600255 counting only the distinct ones).

The product of its digits is 32768, while the sum is 38.

The square root of 218484812 is about 14781.2317484031. The cubic root of 218484812 is about 602.2919853752.

The spelling of 218484812 in words is "two hundred eighteen million, four hundred eighty-four thousand, eight hundred twelve".