478687642 has 16 divisors (see below), whose sum is σ = 724586112. Its totient is φ = 237168000.

The previous prime is 478687619. The next prime is 478687663. The reversal of 478687642 is 246786874.

It is a self number, because there is not a number n which added to its sum of digits gives 478687642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117642 + ... + 121642.

It is an arithmetic number, because the mean of its divisors is an integer number (45286632).

Almost surely, 2^478687642 is an apocalyptic number.

478687642 is a deficient number, since it is larger than the sum of its proper divisors (245898470).

478687642 is a wasteful number, since it uses less digits than its factorization.

478687642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533.

The product of its digits is 3612672, while the sum is 52.

The square root of 478687642 is about 21878.9314638535. The cubic root of 478687642 is about 782.2593063875.

The spelling of 478687642 in words is "four hundred seventy-eight million, six hundred eighty-seven thousand, six hundred forty-two".