218280460 has 12 divisors (see below), whose sum is σ = 458389008. Its totient is φ = 87312176.

The previous prime is 218280451. The next prime is 218280463. The reversal of 218280460 is 64082812.

It is not an unprimeable number, because it can be changed into a prime (218280463) 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, 5456992 + ... + 5457031.

It is an arithmetic number, because the mean of its divisors is an integer number (38199084).

Almost surely, 2^218280460 is an apocalyptic number.

218280460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218280460 is an abundant number, since it is smaller than the sum of its proper divisors (240108548).

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

218280460 is a wasteful number, since it uses less digits than its factorization.

218280460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10914032 (or 10914030 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 218280460 is about 14774.3175815332. The cubic root of 218280460 is about 602.1041493371.

The spelling of 218280460 in words is "two hundred eighteen million, two hundred eighty thousand, four hundred sixty".