218485480 has 16 divisors (see below), whose sum is σ = 491592420. Its totient is φ = 87394176.

The previous prime is 218485447. The next prime is 218485493. The reversal of 218485480 is 84584812.

It can be written as a sum of positive squares in 2 ways, for example, as 216619524 + 1865956 = 14718^2 + 1366^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 5462137 = 218485480 / (2 + 1 + 8 + 4 + 8 + 5 + 4 + 8 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2731029 + ... + 2731108.

Almost surely, 2^218485480 is an apocalyptic number.

218485480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218485480 is an abundant number, since it is smaller than the sum of its proper divisors (273106940).

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

218485480 is a wasteful number, since it uses less digits than its factorization.

218485480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5462148 (or 5462144 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 40.

The square root of 218485480 is about 14781.2543446082. The cubic root of 218485480 is about 602.2925991946.

The spelling of 218485480 in words is "two hundred eighteen million, four hundred eighty-five thousand, four hundred eighty".