216709086 has 16 divisors (see below), whose sum is σ = 472819968. Its totient is φ = 65669400.

The previous prime is 216709069. The next prime is 216709091. The reversal of 216709086 is 680907612.

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 7 ways as a sum of consecutive naturals, for example, 1641670 + ... + 1641801.

It is an arithmetic number, because the mean of its divisors is an integer number (29551248).

Almost surely, 2^216709086 is an apocalyptic number.

216709086 is an abundant number, since it is smaller than the sum of its proper divisors (256110882).

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

216709086 is a wasteful number, since it uses less digits than its factorization.

216709086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283487.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 216709086 is about 14721.0422864687. The cubic root of 216709086 is about 600.6558439644.

The spelling of 216709086 in words is "two hundred sixteen million, seven hundred nine thousand, eighty-six".