218836856 has 16 divisors (see below), whose sum is σ = 468936240. Its totient is φ = 93787200.

The previous prime is 218836837. The next prime is 218836879. The reversal of 218836856 is 658638812.

It is a super-3 number, since 3×218836856³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 218836856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1953845 + ... + 1953956.

It is an arithmetic number, because the mean of its divisors is an integer number (29308515).

Almost surely, 2^218836856 is an apocalyptic number.

It is an amenable number.

218836856 is an abundant number, since it is smaller than the sum of its proper divisors (250099384).

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

218836856 is a wasteful number, since it uses less digits than its factorization.

218836856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907814 (or 3907810 counting only the distinct ones).

The product of its digits is 552960, while the sum is 47.

The square root of 218836856 is about 14793.1354350591. The cubic root of 218836856 is about 602.6153022787.

The spelling of 218836856 in words is "two hundred eighteen million, eight hundred thirty-six thousand, eight hundred fifty-six".