656444 has 12 divisors (see below), whose sum is σ = 1188600. Its totient is φ = 316848.

The previous prime is 656429. The next prime is 656459. The reversal of 656444 is 444656.

It is an interprime number because it is at equal distance from previous prime (656429) and next prime (656459).

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

656444 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, 2714 + ... + 2945.

It is an arithmetic number, because the mean of its divisors is an integer number (99050).

2⁶⁵⁶⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

656444 is a deficient number, since it is larger than the sum of its proper divisors (532156).

656444 is a wasteful number, since it uses less digits than its factorization.

656444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5692 (or 5690 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 656444 is about 810.2123178525. The cubic root of 656444 is about 86.9092284425.

The spelling of 656444 in words is "six hundred fifty-six thousand, four hundred forty-four".