216830880 has 288 divisors, whose sum is σ = 864864000. Its totient is φ = 49448448.

The previous prime is 216830879. The next prime is 216830893. The reversal of 216830880 is 88038612.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 493701 + ... + 494139.

It is an arithmetic number, because the mean of its divisors is an integer number (3003000).

Almost surely, 2^216830880 is an apocalyptic number.

216830880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216830880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432432000).

216830880 is an abundant number, since it is smaller than the sum of its proper divisors (648033120).

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

216830880 is a wasteful number, since it uses less digits than its factorization.

216830880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 216830880 is about 14725.1784369494. The cubic root of 216830880 is about 600.7683489797.

The spelling of 216830880 in words is "two hundred sixteen million, eight hundred thirty thousand, eight hundred eighty".