216428232 has 64 divisors (see below), whose sum is σ = 555252480. Its totient is φ = 70267392.

The previous prime is 216428213. The next prime is 216428239. The reversal of 216428232 is 232824612.

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

It is a self number, because there is not a number n which added to its sum of digits gives 216428232.

It is not an unprimeable number, because it can be changed into a prime (216428239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352758 + ... + 353370.

It is an arithmetic number, because the mean of its divisors is an integer number (8675820).

Almost surely, 2^216428232 is an apocalyptic number.

It is a pronic number, being equal to 14711×14712.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216428232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277626240).

216428232 is an abundant number, since it is smaller than the sum of its proper divisors (338824248).

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

216428232 is a wasteful number, since it uses less digits than its factorization.

216428232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 978 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 216428232 is about 14711.4999915032. The cubic root of 216428232 is about 600.3962493642.

The spelling of 216428232 in words is "two hundred sixteen million, four hundred twenty-eight thousand, two hundred thirty-two".