478256785 has 4 divisors (see below), whose sum is σ = 573908148. Its totient is φ = 382605424.

The previous prime is 478256749. The next prime is 478256791. The reversal of 478256785 is 587652874.

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 342953361 + 135303424 = 18519^2 + 11632^2 .

It is a cyclic number.

It is not a de Polignac number, because 478256785 - 2¹³ = 478248593 is a prime.

It is a Duffinian number.

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, 47825674 + ... + 47825683.

It is an arithmetic number, because the mean of its divisors is an integer number (143477037).

Almost surely, 2^478256785 is an apocalyptic number.

It is an amenable number.

478256785 is a deficient number, since it is larger than the sum of its proper divisors (95651363).

478256785 is an equidigital number, since it uses as much as digits as its factorization.

478256785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95651362.

The product of its digits is 3763200, while the sum is 52.

The square root of 478256785 is about 21869.0828568552. The cubic root of 478256785 is about 782.0245373785.

The spelling of 478256785 in words is "four hundred seventy-eight million, two hundred fifty-six thousand, seven hundred eighty-five".