216384028 has 24 divisors (see below), whose sum is σ = 433080032. Its totient is φ = 92669184.

The previous prime is 216384017. The next prime is 216384037. The reversal of 216384028 is 820483612.

It is a junction number, because it is equal to n+sod(n) for n = 216383984 and 216384002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71800 + ... + 74752.

Almost surely, 2^216384028 is an apocalyptic number.

216384028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216384028 is an abundant number, since it is smaller than the sum of its proper divisors (216696004).

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

216384028 is a wasteful number, since it uses less digits than its factorization.

216384028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5581 (or 5579 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 216384028 is about 14709.9975526850. The cubic root of 216384028 is about 600.3553709591.

The spelling of 216384028 in words is "two hundred sixteen million, three hundred eighty-four thousand, twenty-eight".