505990 has 8 divisors (see below), whose sum is σ = 910800. Its totient is φ = 202392.

The previous prime is 505979. The next prime is 506047. The reversal of 505990 is 99505.

505990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent 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, 25290 + ... + 25309.

It is an arithmetic number, because the mean of its divisors is an integer number (113850).

2⁵⁰⁵⁹⁹⁰ is an apocalyptic number.

505990 is a deficient number, since it is larger than the sum of its proper divisors (404810).

505990 is a wasteful number, since it uses less digits than its factorization.

505990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50606.

The product of its (nonzero) digits is 2025, while the sum is 28.

The square root of 505990 is about 711.3297406970. The cubic root of 505990 is about 79.6857463410.

The spelling of 505990 in words is "five hundred five thousand, nine hundred ninety".