654656 has 28 divisors (see below), whose sum is σ = 1330452. Its totient is φ = 319488.

The previous prime is 654629. The next prime is 654671. The reversal of 654656 is 656456.

654656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 313600 + 341056 = 560^2 + 584^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

654656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3296 + ... + 3488.

2⁶⁵⁴⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665226).

654656 is an abundant number, since it is smaller than the sum of its proper divisors (675796).

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

654656 is a wasteful number, since it uses less digits than its factorization.

654656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 248 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 654656 is about 809.1081509910. The cubic root of 654656 is about 86.8302498855.

The spelling of 654656 in words is "six hundred fifty-four thousand, six hundred fifty-six".