218204880 has 80 divisors (see below), whose sum is σ = 680861184. Its totient is φ = 57807360.

The previous prime is 218204851. The next prime is 218204881. The reversal of 218204880 is 88402812.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×218204880² = 95226739311628800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218204881) 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, 34785 + ... + 40575.

Almost surely, 2^218204880 is an apocalyptic number.

218204880 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 218204880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340430592).

218204880 is an abundant number, since it is smaller than the sum of its proper divisors (462656304).

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

218204880 is a wasteful number, since it uses less digits than its factorization.

218204880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5964 (or 5958 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 218204880 is about 14771.7595431282. The cubic root of 218204880 is about 602.0346481016.

The spelling of 218204880 in words is "two hundred eighteen million, two hundred four thousand, eight hundred eighty".