218432328 has 32 divisors (see below), whose sum is σ = 554235360. Its totient is φ = 71723520.

The previous prime is 218432327. The next prime is 218432329. The reversal of 218432328 is 823234812.

It is an interprime number because it is at equal distance from previous prime (218432327) and next prime (218432329).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (218432323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66313 + ... + 69528.

It is an arithmetic number, because the mean of its divisors is an integer number (17319855).

Almost surely, 2^218432328 is an apocalyptic number.

It is an amenable number.

218432328 is an abundant number, since it is smaller than the sum of its proper divisors (335803032).

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

218432328 is a wasteful number, since it uses less digits than its factorization.

218432328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135917 (or 135913 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 218432328 is about 14779.4562822859. The cubic root of 218432328 is about 602.2437543735.

The spelling of 218432328 in words is "two hundred eighteen million, four hundred thirty-two thousand, three hundred twenty-eight".