561790 has 8 divisors (see below), whose sum is σ = 1011240. Its totient is φ = 224712.

The previous prime is 561787. The next prime is 561797. The reversal of 561790 is 97165.

561790 = 158² + 159² + ... + 177².

It is a happy number.

561790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28080 + ... + 28099.

It is an arithmetic number, because the mean of its divisors is an integer number (126405).

2⁵⁶¹⁷⁹⁰ is an apocalyptic number.

561790 is a deficient number, since it is larger than the sum of its proper divisors (449450).

561790 is a wasteful number, since it uses less digits than its factorization.

561790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56186.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 561790 is about 749.5265172094. The cubic root of 561790 is about 82.5134352163.

The spelling of 561790 in words is "five hundred sixty-one thousand, seven hundred ninety".