216784372 has 12 divisors (see below), whose sum is σ = 433568800. Its totient is φ = 92907576.

The previous prime is 216784327. The next prime is 216784417. The reversal of 216784372 is 273487612.

It is an interprime number because it is at equal distance from previous prime (216784327) and next prime (216784417).

216784372 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3871122 + ... + 3871177.

Almost surely, 2^216784372 is an apocalyptic number.

It is an amenable number.

216784372 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216784372 is a wasteful number, since it uses less digits than its factorization.

216784372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742310 (or 7742308 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 216784372 is about 14723.5991523812. The cubic root of 216784372 is about 600.7253930252.

It can be divided in two parts, 216784 and 372, that added together give a square (217156 = 466²).

The spelling of 216784372 in words is "two hundred sixteen million, seven hundred eighty-four thousand, three hundred seventy-two".