556784 has 40 divisors (see below), whose sum is σ = 1205280. Its totient is φ = 247808.

The previous prime is 556781. The next prime is 556789. The reversal of 556784 is 487655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6212 + ... + 6300.

It is an arithmetic number, because the mean of its divisors is an integer number (30132).

2⁵⁵⁶⁷⁸⁴ 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 556784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602640).

556784 is an abundant number, since it is smaller than the sum of its proper divisors (648496).

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

556784 is a wasteful number, since it uses less digits than its factorization.

556784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 131 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 556784 is about 746.1796030447. The cubic root of 556784 is about 82.2676166292.

The spelling of 556784 in words is "five hundred fifty-six thousand, seven hundred eighty-four".