428656216 has 16 divisors (see below), whose sum is σ = 805802400. Its totient is φ = 213775584.

The previous prime is 428656213. The next prime is 428656229. The reversal of 428656216 is 612656824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428656213) 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, 65760 + ... + 71983.

It is an arithmetic number, because the mean of its divisors is an integer number (50362650).

Almost surely, 2^428656216 is an apocalyptic number.

It is an amenable number.

428656216 is a deficient number, since it is larger than the sum of its proper divisors (377146184).

428656216 is a wasteful number, since it uses less digits than its factorization.

428656216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138138 (or 138134 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 428656216 is about 20704.0144899486. The cubic root of 428656216 is about 753.9971575011.

The spelling of 428656216 in words is "four hundred twenty-eight million, six hundred fifty-six thousand, two hundred sixteen".