516806 has 4 divisors (see below), whose sum is σ = 775212. Its totient is φ = 258402.

The previous prime is 516793. The next prime is 516811. The reversal of 516806 is 608615.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 516806.

It is an unprimeable number.

516806 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129200 + ... + 129203.

It is an arithmetic number, because the mean of its divisors is an integer number (193803).

2⁵¹⁶⁸⁰⁶ is an apocalyptic number.

516806 is a deficient number, since it is larger than the sum of its proper divisors (258406).

516806 is a wasteful number, since it uses less digits than its factorization.

516806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258405.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 516806 is about 718.8922033240. The cubic root of 516806 is about 80.2495333546.

Subtracting 516806 from its reverse (608615), we obtain a square (91809 = 303²).

The spelling of 516806 in words is "five hundred sixteen thousand, eight hundred six".