561938 has 8 divisors (see below), whose sum is σ = 907788. Its totient is φ = 259344.

The previous prime is 561931. The next prime is 561943. The reversal of 561938 is 839165.

It can be written as a sum of positive squares in 2 ways, for example, as 543169 + 18769 = 737^2 + 137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (561931) by changing a digit.

561938 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10781 + ... + 10832.

2⁵⁶¹⁹³⁸ is an apocalyptic number.

561938 is a deficient number, since it is larger than the sum of its proper divisors (345850).

561938 is a wasteful number, since it uses less digits than its factorization.

561938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21628.

The product of its digits is 6480, while the sum is 32.

The square root of 561938 is about 749.6252397031. The cubic root of 561938 is about 82.5206804599.

The spelling of 561938 in words is "five hundred sixty-one thousand, nine hundred thirty-eight".