478667820 has 24 divisors (see below), whose sum is σ = 1340270064. Its totient is φ = 127644736.

The previous prime is 478667801. The next prime is 478667831. The reversal of 478667820 is 28766874.

It is a self number, because there is not a number n which added to its sum of digits gives 478667820.

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, 3988839 + ... + 3988958.

It is an arithmetic number, because the mean of its divisors is an integer number (55844586).

Almost surely, 2^478667820 is an apocalyptic number.

It is an amenable number.

478667820 is an abundant number, since it is smaller than the sum of its proper divisors (861602244).

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

478667820 is a wasteful number, since it uses less digits than its factorization.

478667820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7977809 (or 7977807 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 478667820 is about 21878.4784662919. The cubic root of 478667820 is about 782.2485087005.

The spelling of 478667820 in words is "four hundred seventy-eight million, six hundred sixty-seven thousand, eight hundred twenty".