216924320 has 24 divisors (see below), whose sum is σ = 512484084. Its totient is φ = 86769664.

The previous prime is 216924307. The next prime is 216924343. The reversal of 216924320 is 23429612.

It can be written as a sum of positive squares in 2 ways, for example, as 210714256 + 6210064 = 14516^2 + 2492^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677729 + ... + 678048.

Almost surely, 2^216924320 is an apocalyptic number.

216924320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216924320 is an abundant number, since it is smaller than the sum of its proper divisors (295559764).

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

216924320 is a wasteful number, since it uses less digits than its factorization.

216924320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355792 (or 1355784 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 216924320 is about 14728.3508920721. The cubic root of 216924320 is about 600.8546339419.

The spelling of 216924320 in words is "two hundred sixteen million, nine hundred twenty-four thousand, three hundred twenty".