674656 has 24 divisors (see below), whose sum is σ = 1375920. Its totient is φ = 325248.

The previous prime is 674647. The next prime is 674669. The reversal of 674656 is 656476.

It is a congruent number.

It is an unprimeable number.

674656 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, 565 + ... + 1291.

It is an arithmetic number, because the mean of its divisors is an integer number (57330).

2⁶⁷⁴⁶⁵⁶ 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 674656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687960).

674656 is an abundant number, since it is smaller than the sum of its proper divisors (701264).

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

674656 is a wasteful number, since it uses less digits than its factorization.

674656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 758 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 674656 is about 821.3744578449. The cubic root of 674656 is about 87.7056279535.

The spelling of 674656 in words is "six hundred seventy-four thousand, six hundred fifty-six".