511998 has 8 divisors (see below), whose sum is σ = 1024008. Its totient is φ = 170664.

The previous prime is 511997. The next prime is 512009. The reversal of 511998 is 899115.

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

511998 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42661 + ... + 42672.

It is an arithmetic number, because the mean of its divisors is an integer number (128001).

2⁵¹¹⁹⁹⁸ is an apocalyptic number.

511998 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.

511998 is a wasteful number, since it uses less digits than its factorization.

511998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85338.

The product of its digits is 3240, while the sum is 33.

The square root of 511998 is about 715.5403552561. The cubic root of 511998 is about 79.9998958332. Note that the first 3 decimals are identical.

The spelling of 511998 in words is "five hundred eleven thousand, nine hundred ninety-eight".