505478 has 8 divisors (see below), whose sum is σ = 802872. Its totient is φ = 237856.

The previous prime is 505469. The next prime is 505481. The reversal of 505478 is 874505.

505478 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 an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 505478.

It is a congruent number.

It is an unprimeable number.

505478 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7400 + ... + 7467.

It is an arithmetic number, because the mean of its divisors is an integer number (100359).

2⁵⁰⁵⁴⁷⁸ is an apocalyptic number.

505478 is a deficient number, since it is larger than the sum of its proper divisors (297394).

505478 is a wasteful number, since it uses less digits than its factorization.

505478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14886.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 505478 is about 710.9697602571. The cubic root of 505478 is about 79.6588598603.

The spelling of 505478 in words is "five hundred five thousand, four hundred seventy-eight".