478678728 has 32 divisors (see below), whose sum is σ = 1305488160. Its totient is φ = 145054080.

The previous prime is 478678699. The next prime is 478678747. The reversal of 478678728 is 827876874.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 906325 + ... + 906852.

It is an arithmetic number, because the mean of its divisors is an integer number (40796505).

Almost surely, 2^478678728 is an apocalyptic number.

It is an amenable number.

478678728 is an abundant number, since it is smaller than the sum of its proper divisors (826809432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

478678728 is a wasteful number, since it uses less digits than its factorization.

478678728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813197 (or 1813193 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 57.

The square root of 478678728 is about 21878.7277509457. The cubic root of 478678728 is about 782.2544506792.

The spelling of 478678728 in words is "four hundred seventy-eight million, six hundred seventy-eight thousand, seven hundred twenty-eight".