216340684 has 18 divisors (see below), whose sum is σ = 440408220. Its totient is φ = 92717352.

The previous prime is 216340681. The next prime is 216340717. The reversal of 216340684 is 486043612.

It is not an unprimeable number, because it can be changed into a prime (216340681) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 551694 + ... + 552085.

Almost surely, 2^216340684 is an apocalyptic number.

It is an amenable number.

216340684 is an abundant number, since it is smaller than the sum of its proper divisors (224067536).

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

216340684 is a wasteful number, since it uses less digits than its factorization.

216340684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103797 (or 1103788 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 216340684 is about 14708.5241951734. The cubic root of 216340684 is about 600.3152824474.

The spelling of 216340684 in words is "two hundred sixteen million, three hundred forty thousand, six hundred eighty-four".