478468638 has 24 divisors (see below), whose sum is σ = 1097664048. Its totient is φ = 150107712.

The previous prime is 478468633. The next prime is 478468649. The reversal of 478468638 is 836864874.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478468631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 781506 + ... + 782117.

It is an arithmetic number, because the mean of its divisors is an integer number (45736002).

Almost surely, 2^478468638 is an apocalyptic number.

478468638 is an abundant number, since it is smaller than the sum of its proper divisors (619195410).

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

478468638 is a wasteful number, since it uses less digits than its factorization.

478468638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563648 (or 1563645 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The square root of 478468638 is about 21873.9259850627. The cubic root of 478468638 is about 782.1399912467.

The spelling of 478468638 in words is "four hundred seventy-eight million, four hundred sixty-eight thousand, six hundred thirty-eight".