656216 has 16 divisors (see below), whose sum is σ = 1342440. Its totient is φ = 298240.

The previous prime is 656171. The next prime is 656221. The reversal of 656216 is 612656.

It is a congruent number.

It is an unprimeable number.

656216 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3641 + ... + 3816.

2⁶⁵⁶²¹⁶ is an apocalyptic number.

It is an amenable number.

656216 is an abundant number, since it is smaller than the sum of its proper divisors (686224).

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

656216 is a wasteful number, since it uses less digits than its factorization.

656216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7474 (or 7470 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 656216 is about 810.0716017736. The cubic root of 656216 is about 86.8991653355.

The spelling of 656216 in words is "six hundred fifty-six thousand, two hundred sixteen".