505207478 has 8 divisors (see below), whose sum is σ = 758386272. Its totient is φ = 252412056.

The previous prime is 505207477. The next prime is 505207541. The reversal of 505207478 is 874702505.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505207477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92525 + ... + 97832.

It is an arithmetic number, because the mean of its divisors is an integer number (94798284).

Almost surely, 2^505207478 is an apocalyptic number.

505207478 is a deficient number, since it is larger than the sum of its proper divisors (253178794).

505207478 is a wasteful number, since it uses less digits than its factorization.

505207478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191686.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 505207478 is about 22476.8209051013. The cubic root of 505207478 is about 796.4464670002.

The spelling of 505207478 in words is "five hundred five million, two hundred seven thousand, four hundred seventy-eight".