2218947280 has 80 divisors (see below), whose sum is σ = 5648995584. Its totient is φ = 803888640.

The previous prime is 2218947271. The next prime is 2218947317. The reversal of 2218947280 is 827498122.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239209 + ... + 248311.

Almost surely, 2^2218947280 is an apocalyptic number.

2218947280 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 2218947280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2824497792).

2218947280 is an abundant number, since it is smaller than the sum of its proper divisors (3430048304).

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

2218947280 is a wasteful number, since it uses less digits than its factorization.

2218947280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9404 (or 9398 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 2218947280 is about 47105.7032640422. The cubic root of 2218947280 is about 1304.3145169555.

The spelling of 2218947280 in words is "two billion, two hundred eighteen million, nine hundred forty-seven thousand, two hundred eighty".