218308260 has 96 divisors (see below), whose sum is σ = 629959680. Its totient is φ = 56463232.

The previous prime is 218308253. The next prime is 218308273. The reversal of 218308260 is 62803812.

218308260 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 293449 + ... + 294191.

It is an arithmetic number, because the mean of its divisors is an integer number (6562080).

Almost surely, 2^218308260 is an apocalyptic number.

218308260 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 218308260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314979840).

218308260 is an abundant number, since it is smaller than the sum of its proper divisors (411651420).

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

218308260 is a wasteful number, since it uses less digits than its factorization.

218308260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 218308260 is about 14775.2583733754. The cubic root of 218308260 is about 602.1297093968.

The spelling of 218308260 in words is "two hundred eighteen million, three hundred eight thousand, two hundred sixty".