218703040 has 28 divisors (see below), whose sum is σ = 520787376. Its totient is φ = 87481088.

The previous prime is 218703019. The next prime is 218703049. The reversal of 218703040 is 40307812.

It is a junction number, because it is equal to n+sod(n) for n = 218702996 and 218703014.

It is not an unprimeable number, because it can be changed into a prime (218703049) 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, 341404 + ... + 342043.

Almost surely, 2^218703040 is an apocalyptic number.

218703040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218703040 is an abundant number, since it is smaller than the sum of its proper divisors (302084336).

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

218703040 is an equidigital number, since it uses as much as digits as its factorization.

218703040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683464 (or 683454 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 218703040 is about 14788.6118347869. The cubic root of 218703040 is about 602.4924466607.

The spelling of 218703040 in words is "two hundred eighteen million, seven hundred three thousand, forty".