216482728 has 64 divisors (see below), whose sum is σ = 507830400. Its totient is φ = 84049920.

The previous prime is 216482723. The next prime is 216482729. The reversal of 216482728 is 827284612.

216482728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216482723) 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, 281128 + ... + 281896.

It is an arithmetic number, because the mean of its divisors is an integer number (7934850).

Almost surely, 2^216482728 is an apocalyptic number.

216482728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216482728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253915200).

216482728 is an abundant number, since it is smaller than the sum of its proper divisors (291347672).

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

216482728 is a wasteful number, since it uses less digits than its factorization.

216482728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1246 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 216482728 is about 14713.3520314033. The cubic root of 216482728 is about 600.4466378123.

The spelling of 216482728 in words is "two hundred sixteen million, four hundred eighty-two thousand, seven hundred twenty-eight".