216854764 has 48 divisors (see below), whose sum is σ = 458131968. Its totient is φ = 87804288.

The previous prime is 216854723. The next prime is 216854773. The reversal of 216854764 is 467458612.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 216854764.

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, 51424 + ... + 55480.

It is an arithmetic number, because the mean of its divisors is an integer number (9544416).

Almost surely, 2^216854764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216854764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229065984).

216854764 is an abundant number, since it is smaller than the sum of its proper divisors (241277204).

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

216854764 is a wasteful number, since it uses less digits than its factorization.

216854764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174 (or 4172 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 216854764 is about 14725.9894064881. The cubic root of 216854764 is about 600.7904064537.

The spelling of 216854764 in words is "two hundred sixteen million, eight hundred fifty-four thousand, seven hundred sixty-four".