405568 has 14 divisors (see below), whose sum is σ = 804926. Its totient is φ = 202752.

The previous prime is 405553. The next prime is 405577. The reversal of 405568 is 865504.

It can be written as a sum of positive squares in only one way, i.e., 322624 + 82944 = 568^2 + 288^2 .

It is a plaindrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3105 + ... + 3232.

2⁴⁰⁵⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

405568 is a deficient number, since it is larger than the sum of its proper divisors (399358).

405568 is an equidigital number, since it uses as much as digits as its factorization.

405568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349 (or 6339 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 405568 is about 636.8422096564. The cubic root of 405568 is about 74.0209339362.

The spelling of 405568 in words is "four hundred five thousand, five hundred sixty-eight".