509908 has 12 divisors (see below), whose sum is σ = 1019872. Its totient is φ = 218520.

The previous prime is 509879. The next prime is 509909. The reversal of 509908 is 809905.

509908 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 509908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509909) 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, 9078 + ... + 9133.

2⁵⁰⁹⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

509908 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.

509908 is a wasteful number, since it uses less digits than its factorization.

509908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18222 (or 18220 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 509908 is about 714.0784270653. The cubic root of 509908 is about 79.8908929299.

The spelling of 509908 in words is "five hundred nine thousand, nine hundred eight".