500018 has 16 divisors (see below), whose sum is σ = 800280. Its totient is φ = 233856.

The previous prime is 500009. The next prime is 500029. The reversal of 500018 is 810005.

It can be written as a sum of positive squares in 4 ways, for example, as 452929 + 47089 = 673^2 + 217^2 .

It is a Curzon number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 499975 and 500011.

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, 2030 + ... + 2262.

2⁵⁰⁰⁰¹⁸ is an apocalyptic number.

500018 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

500018 is a deficient number, since it is larger than the sum of its proper divisors (300262).

500018 is a wasteful number, since it uses less digits than its factorization.

500018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 500018 is about 707.1195089941. The cubic root of 500018 is about 79.3710050276.

It can be divided in two parts, 5000 and 18, that multiplied together give a square (90000 = 300²).

The spelling of 500018 in words is "five hundred thousand, eighteen".