561768 has 32 divisors (see below), whose sum is σ = 1425600. Its totient is φ = 184448.

The previous prime is 561767. The next prime is 561787. The reversal of 561768 is 867165.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561761) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2005 + ... + 2267.

It is an arithmetic number, because the mean of its divisors is an integer number (44550).

2⁵⁶¹⁷⁶⁸ is an apocalyptic number.

It is an amenable number.

561768 is an abundant number, since it is smaller than the sum of its proper divisors (863832).

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

561768 is a wasteful number, since it uses less digits than its factorization.

561768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 357 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 561768 is about 749.5118411339. The cubic root of 561768 is about 82.5123581120.

The spelling of 561768 in words is "five hundred sixty-one thousand, seven hundred sixty-eight".