503866 has 16 divisors (see below), whose sum is σ = 848160. Its totient is φ = 222480.

The previous prime is 503857. The next prime is 503869. The reversal of 503866 is 668305.

503866 = 209² + 210² + ... + 219².

It is not an unprimeable number, because it can be changed into a prime (503869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (53010).

2⁵⁰³⁸⁶⁶ is an apocalyptic number.

503866 is a deficient number, since it is larger than the sum of its proper divisors (344294).

503866 is a wasteful number, since it uses less digits than its factorization.

503866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 503866 is about 709.8351921397. The cubic root of 503866 is about 79.5740907065.

It can be divided in two parts, 503 and 866, that added together give a square (1369 = 37²).

The spelling of 503866 in words is "five hundred three thousand, eight hundred sixty-six".