478487778 has 8 divisors (see below), whose sum is σ = 956975568. Its totient is φ = 159495924.

The previous prime is 478487731. The next prime is 478487783. The reversal of 478487778 is 877784874.

It is a sphenic number, since it is the product of 3 distinct primes.

478487778 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39873976 + ... + 39873987.

It is an arithmetic number, because the mean of its divisors is an integer number (119621946).

Almost surely, 2^478487778 is an apocalyptic number.

478487778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

478487778 is a wasteful number, since it uses less digits than its factorization.

478487778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79747968.

The product of its digits is 19668992, while the sum is 60.

The square root of 478487778 is about 21874.3634878823. The cubic root of 478487778 is about 782.1504203244.

The spelling of 478487778 in words is "four hundred seventy-eight million, four hundred eighty-seven thousand, seven hundred seventy-eight".