478990055 has 4 divisors (see below), whose sum is σ = 574788072. Its totient is φ = 383192040.

The previous prime is 478990051. The next prime is 478990063. The reversal of 478990055 is 550099874.

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

It is not a de Polignac number, because 478990055 - 2² = 478990051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 478989991 and 478990009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478990051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47899001 + ... + 47899010.

It is an arithmetic number, because the mean of its divisors is an integer number (143697018).

Almost surely, 2^478990055 is an apocalyptic number.

478990055 is a deficient number, since it is larger than the sum of its proper divisors (95798017).

478990055 is an equidigital number, since it uses as much as digits as its factorization.

478990055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95798016.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 478990055 is about 21885.8414277359. The cubic root of 478990055 is about 782.4240036161.

The spelling of 478990055 in words is "four hundred seventy-eight million, nine hundred ninety thousand, fifty-five".