561928 has 8 divisors (see below), whose sum is σ = 1053630. Its totient is φ = 280960.

The previous prime is 561923. The next prime is 561931. The reversal of 561928 is 829165.

It can be written as a sum of positive squares in only one way, i.e., 289444 + 272484 = 538^2 + 522^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 561928.

It is not an unprimeable number, because it can be changed into a prime (561923) by changing a digit.

561928 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 as a sum of consecutive naturals, namely, 35113 + ... + 35128.

2⁵⁶¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

561928 is a deficient number, since it is larger than the sum of its proper divisors (491702).

561928 is a wasteful number, since it uses less digits than its factorization.

561928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70247 (or 70243 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 561928 is about 749.6185696739. The cubic root of 561928 is about 82.5201909565.

The spelling of 561928 in words is "five hundred sixty-one thousand, nine hundred twenty-eight".