478685715 has 16 divisors (see below), whose sum is σ = 806208000. Its totient is φ = 241862112.

The previous prime is 478685707. The next prime is 478685719. The reversal of 478685715 is 517586874.

It is a happy number.

It is not a de Polignac number, because 478685715 - 2³ = 478685707 is a prime.

It is a super-2 number, since 2×478685715² = 458280027490122450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (478685719) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 839515 + ... + 840084.

It is an arithmetic number, because the mean of its divisors is an integer number (50388000).

Almost surely, 2^478685715 is an apocalyptic number.

478685715 is a deficient number, since it is larger than the sum of its proper divisors (327522285).

478685715 is a wasteful number, since it uses less digits than its factorization.

478685715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679626.

The product of its digits is 1881600, while the sum is 51.

The square root of 478685715 is about 21878.8874260096. The cubic root of 478685715 is about 782.2582567011.

The spelling of 478685715 in words is "four hundred seventy-eight million, six hundred eighty-five thousand, seven hundred fifteen".