218030280 has 128 divisors (see below), whose sum is σ = 709430400. Its totient is φ = 53604096.

The previous prime is 218030273. The next prime is 218030327. The reversal of 218030280 is 82030812.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 218030280.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 263227 + ... + 264053.

It is an arithmetic number, because the mean of its divisors is an integer number (5542425).

Almost surely, 2^218030280 is an apocalyptic number.

218030280 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 218030280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354715200).

218030280 is an abundant number, since it is smaller than the sum of its proper divisors (491400120).

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

218030280 is a wasteful number, since it uses less digits than its factorization.

218030280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 218030280 is about 14765.8484348174. The cubic root of 218030280 is about 601.8740294840.

The spelling of 218030280 in words is "two hundred eighteen million, thirty thousand, two hundred eighty".