505858 has 16 divisors (see below), whose sum is σ = 806400. Its totient is φ = 237600.

The previous prime is 505823. The next prime is 505867. The reversal of 505858 is 858505.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

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

It is a congruent number.

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, 2443 + ... + 2641.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

2⁵⁰⁵⁸⁵⁸ is an apocalyptic number.

505858 is a deficient number, since it is larger than the sum of its proper divisors (300542).

505858 is a wasteful number, since it uses less digits than its factorization.

505858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273.

The product of its (nonzero) digits is 8000, while the sum is 31.

The square root of 505858 is about 711.2369506712. The cubic root of 505858 is about 79.6788164061.

The spelling of 505858 in words is "five hundred five thousand, eight hundred fifty-eight".