509898 has 16 divisors (see below), whose sum is σ = 1080000. Its totient is φ = 159936.

The previous prime is 509879. The next prime is 509909. The reversal of 509898 is 898905.

509898 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2398 + ... + 2601.

It is an arithmetic number, because the mean of its divisors is an integer number (67500).

2⁵⁰⁹⁸⁹⁸ is an apocalyptic number.

509898 is an abundant number, since it is smaller than the sum of its proper divisors (570102).

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

509898 is a wasteful number, since it uses less digits than its factorization.

509898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5021.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 509898 is about 714.0714249989. The cubic root of 509898 is about 79.8903706696.

The spelling of 509898 in words is "five hundred nine thousand, eight hundred ninety-eight".