505386478 has 8 divisors (see below), whose sum is σ = 778568472. Its totient is φ = 245863656.

The previous prime is 505386473. The next prime is 505386481. The reversal of 505386478 is 874683505.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505386473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3414700 + ... + 3414847.

It is an arithmetic number, because the mean of its divisors is an integer number (97321059).

Almost surely, 2^505386478 is an apocalyptic number.

505386478 is a deficient number, since it is larger than the sum of its proper divisors (273181994).

505386478 is a wasteful number, since it uses less digits than its factorization.

505386478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6829586.

The product of its (nonzero) digits is 806400, while the sum is 46.

The square root of 505386478 is about 22480.8024322977. The cubic root of 505386478 is about 796.5405188434.

The spelling of 505386478 in words is "five hundred five million, three hundred eighty-six thousand, four hundred seventy-eight".