511986 has 8 divisors (see below), whose sum is σ = 1023984. Its totient is φ = 170660.

The previous prime is 511963. The next prime is 511991. The reversal of 511986 is 689115.

It is a happy number.

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

511986 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42660 + ... + 42671.

It is an arithmetic number, because the mean of its divisors is an integer number (127998).

2⁵¹¹⁹⁸⁶ is an apocalyptic number.

511986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

511986 is a wasteful number, since it uses less digits than its factorization.

511986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85336.

The product of its digits is 2160, while the sum is 30.

The square root of 511986 is about 715.5319699357. The cubic root of 511986 is about 79.9992708267. Note that the first 3 decimals are identical.

The spelling of 511986 in words is "five hundred eleven thousand, nine hundred eighty-six".