216789244 has 24 divisors (see below), whose sum is σ = 434604128. Its totient is φ = 92689920.

The previous prime is 216789233. The next prime is 216789269. The reversal of 216789244 is 442987612.

It is a self number, because there is not a number n which added to its sum of digits gives 216789244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3184 + ... + 21064.

Almost surely, 2^216789244 is an apocalyptic number.

It is an amenable number.

216789244 is an abundant number, since it is smaller than the sum of its proper divisors (217814884).

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

216789244 is a wasteful number, since it uses less digits than its factorization.

216789244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18325 (or 18323 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 216789244 is about 14723.7646001286. The cubic root of 216789244 is about 600.7298932146.

The spelling of 216789244 in words is "two hundred sixteen million, seven hundred eighty-nine thousand, two hundred forty-four".