216422680 has 16 divisors (see below), whose sum is σ = 486951120. Its totient is φ = 86569056.

The previous prime is 216422677. The next prime is 216422681. The reversal of 216422680 is 86224612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216422681) 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, 2705244 + ... + 2705323.

It is an arithmetic number, because the mean of its divisors is an integer number (30434445).

Almost surely, 2^216422680 is an apocalyptic number.

216422680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216422680 is an abundant number, since it is smaller than the sum of its proper divisors (270528440).

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

216422680 is a wasteful number, since it uses less digits than its factorization.

216422680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5410578 (or 5410574 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 216422680 is about 14711.3112943748. The cubic root of 216422680 is about 600.3911153629.

The spelling of 216422680 in words is "two hundred sixteen million, four hundred twenty-two thousand, six hundred eighty".