218380280 has 16 divisors (see below), whose sum is σ = 491355720. Its totient is φ = 87352096.

The previous prime is 218380231. The next prime is 218380289. The reversal of 218380280 is 82083812.

218380280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218380289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2729714 + ... + 2729793.

Almost surely, 2^218380280 is an apocalyptic number.

218380280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218380280 is an abundant number, since it is smaller than the sum of its proper divisors (272975440).

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

218380280 is a wasteful number, since it uses less digits than its factorization.

218380280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5459518 (or 5459514 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 218380280 is about 14777.6953548244. The cubic root of 218380280 is about 602.1959164104.

The spelling of 218380280 in words is "two hundred eighteen million, three hundred eighty thousand, two hundred eighty".