478857305 has 4 divisors (see below), whose sum is σ = 574628772. Its totient is φ = 383085840.

The previous prime is 478857289. The next prime is 478857311. The reversal of 478857305 is 503758874.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 213949129 + 264908176 = 14627^2 + 16276^2 .

It is not a de Polignac number, because 478857305 - 2⁴ = 478857289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478857305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47885726 + ... + 47885735.

It is an arithmetic number, because the mean of its divisors is an integer number (143657193).

Almost surely, 2^478857305 is an apocalyptic number.

It is an amenable number.

478857305 is a deficient number, since it is larger than the sum of its proper divisors (95771467).

478857305 is an equidigital number, since it uses as much as digits as its factorization.

478857305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95771466.

The product of its (nonzero) digits is 940800, while the sum is 47.

The square root of 478857305 is about 21882.8084349336. The cubic root of 478857305 is about 782.3517151401.

The spelling of 478857305 in words is "four hundred seventy-eight million, eight hundred fifty-seven thousand, three hundred five".