216989080 has 64 divisors (see below), whose sum is σ = 608705280. Its totient is φ = 67632000.

The previous prime is 216989077. The next prime is 216989089. The reversal of 216989080 is 80989612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216989089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32146 + ... + 38305.

It is an arithmetic number, because the mean of its divisors is an integer number (9511020).

Almost surely, 2^216989080 is an apocalyptic number.

216989080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216989080 is an abundant number, since it is smaller than the sum of its proper divisors (391716200).

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

216989080 is a wasteful number, since it uses less digits than its factorization.

216989080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70480 (or 70476 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 216989080 is about 14730.5492090417. The cubic root of 216989080 is about 600.9144204988.

The spelling of 216989080 in words is "two hundred sixteen million, nine hundred eighty-nine thousand, eighty".