549568 has 28 divisors (see below), whose sum is σ = 1129792. Its totient is φ = 264960.

The previous prime is 549553. The next prime is 549569. The reversal of 549568 is 865945.

Its product of digits (43200) is a multiple of the sum of its prime factors (320).

It is not an unprimeable number, because it can be changed into a prime (549569) by changing a digit.

549568 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, 1846 + ... + 2122.

2⁵⁴⁹⁵⁶⁸ 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 549568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (564896).

549568 is an abundant number, since it is smaller than the sum of its proper divisors (580224).

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

549568 is a wasteful number, since it uses less digits than its factorization.

549568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 310 counting only the distinct ones).

The product of its digits is 43200, while the sum is 37.

The square root of 549568 is about 741.3285371547. The cubic root of 549568 is about 81.9106701207.

The spelling of 549568 in words is "five hundred forty-nine thousand, five hundred sixty-eight".