216304824 has 32 divisors (see below), whose sum is σ = 542689920. Its totient is φ = 71844576.

The previous prime is 216304817. The next prime is 216304861. The reversal of 216304824 is 428403612.

It is a junction number, because it is equal to n+sod(n) for n = 216304791 and 216304800.

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, 9132 + ... + 22715.

It is an arithmetic number, because the mean of its divisors is an integer number (16959060).

Almost surely, 2^216304824 is an apocalyptic number.

216304824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216304824 is an abundant number, since it is smaller than the sum of its proper divisors (326385096).

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

216304824 is a wasteful number, since it uses less digits than its factorization.

216304824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32139 (or 32135 counting only the distinct ones).

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

The square root of 216304824 is about 14707.3051236452. The cubic root of 216304824 is about 600.2821117786.

The spelling of 216304824 in words is "two hundred sixteen million, three hundred four thousand, eight hundred twenty-four".