216880 has 20 divisors (see below), whose sum is σ = 504432. Its totient is φ = 86720.

The previous prime is 216877. The next prime is 216899. The reversal of 216880 is 88612.

216880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

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, 1276 + ... + 1435.

2²¹⁶⁸⁸⁰ is an apocalyptic number.

216880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216880 is an abundant number, since it is smaller than the sum of its proper divisors (287552).

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

216880 is a wasteful number, since it uses less digits than its factorization.

216880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724 (or 2718 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 216880 is about 465.7037685053. The cubic root of 216880 is about 60.0813710774.

The spelling of 216880 in words is "two hundred sixteen thousand, eight hundred eighty".