478884779 has 4 divisors (see below), whose sum is σ = 482540520. Its totient is φ = 475229040.

The previous prime is 478884761. The next prime is 478884787. The reversal of 478884779 is 977488874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478884779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478884719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1827674 + ... + 1827935.

It is an arithmetic number, because the mean of its divisors is an integer number (120635130).

Almost surely, 2^478884779 is an apocalyptic number.

478884779 is a deficient number, since it is larger than the sum of its proper divisors (3655741).

478884779 is a wasteful number, since it uses less digits than its factorization.

478884779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655740.

The product of its digits is 25288704, while the sum is 62.

The square root of 478884779 is about 21883.4361789916. The cubic root of 478884779 is about 782.3666770920.

The spelling of 478884779 in words is "four hundred seventy-eight million, eight hundred eighty-four thousand, seven hundred seventy-nine".