218034380 has 12 divisors (see below), whose sum is σ = 457872240. Its totient is φ = 87213744.

The previous prime is 218034379. The next prime is 218034389. The reversal of 218034380 is 83430812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (218034389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5450840 + ... + 5450879.

It is an arithmetic number, because the mean of its divisors is an integer number (38156020).

Almost surely, 2^218034380 is an apocalyptic number.

218034380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218034380 is an abundant number, since it is smaller than the sum of its proper divisors (239837860).

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

218034380 is a wasteful number, since it uses less digits than its factorization.

218034380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10901728 (or 10901726 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 218034380 is about 14765.9872680427. The cubic root of 218034380 is about 601.8778021527.

The spelling of 218034380 in words is "two hundred eighteen million, thirty-four thousand, three hundred eighty".