216942680 has 16 divisors (see below), whose sum is σ = 488121120. Its totient is φ = 86777056.

The previous prime is 216942679. The next prime is 216942683. The reversal of 216942680 is 86249612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216942683) 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 3 ways as a sum of consecutive naturals, for example, 2711744 + ... + 2711823.

It is an arithmetic number, because the mean of its divisors is an integer number (30507570).

Almost surely, 2^216942680 is an apocalyptic number.

216942680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216942680 is an abundant number, since it is smaller than the sum of its proper divisors (271178440).

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

216942680 is a wasteful number, since it uses less digits than its factorization.

216942680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423578 (or 5423574 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 216942680 is about 14728.9741665874. The cubic root of 216942680 is about 600.8715851377.

The spelling of 216942680 in words is "two hundred sixteen million, nine hundred forty-two thousand, six hundred eighty".