564894 has 40 divisors (see below), whose sum is σ = 1385208. Its totient is φ = 170640.

The previous prime is 564881. The next prime is 564899. The reversal of 564894 is 498465.

564894 is a `hidden beast` number, since 5 + 648 + 9 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564899) by changing a digit.

564894 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 (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1624 + ... + 1940.

2⁵⁶⁴⁸⁹⁴ is an apocalyptic number.

564894 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 564894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (692604).

564894 is an abundant number, since it is smaller than the sum of its proper divisors (820314).

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

564894 is a wasteful number, since it uses less digits than its factorization.

564894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 333 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 564894 is about 751.5943054601. The cubic root of 564894 is about 82.6651238295.

It can be divided in two parts, 56 and 4894, that added together give a triangular number (4950 = T₉₉).

The spelling of 564894 in words is "five hundred sixty-four thousand, eight hundred ninety-four".