561628 has 6 divisors (see below), whose sum is σ = 982856. Its totient is φ = 280812.

The previous prime is 561607. The next prime is 561667. The reversal of 561628 is 826165.

561628 is nontrivially palindromic in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 561596 and 561605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70200 + ... + 70207.

2⁵⁶¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

561628 is a deficient number, since it is larger than the sum of its proper divisors (421228).

561628 is a wasteful number, since it uses less digits than its factorization.

561628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140411 (or 140409 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 561628 is about 749.4184411929. The cubic root of 561628 is about 82.5055031530.

The spelling of 561628 in words is "five hundred sixty-one thousand, six hundred twenty-eight".