656244 has 18 divisors (see below), whose sum is σ = 1658930. Its totient is φ = 218736.

The previous prime is 656237. The next prime is 656263. The reversal of 656244 is 442656.

It is a happy number.

656244 is a `hidden beast` number, since 656 + 2 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 144 = 810^2 + 12^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

656244 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 5 ways as a sum of consecutive naturals, for example, 9079 + ... + 9150.

656244 is a Friedman number, since it can be written as 5^6*(44-2)-6, using all its digits and the basic arithmetic operations.

2⁶⁵⁶²⁴⁴ is an apocalyptic number.

It is an amenable number.

656244 is an abundant number, since it is smaller than the sum of its proper divisors (1002686).

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

656244 is a wasteful number, since it uses less digits than its factorization.

656244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18239 (or 18234 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 656244 is about 810.0888840121. The cubic root of 656244 is about 86.9004012812.

It can be divided in two parts, 656 and 244, that added together give a square (900 = 30²).

The spelling of 656244 in words is "six hundred fifty-six thousand, two hundred forty-four".