478454915 has 4 divisors (see below), whose sum is σ = 574145904. Its totient is φ = 382763928.

The previous prime is 478454909. The next prime is 478454927. The reversal of 478454915 is 519454874.

It is a happy number.

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-478454915 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478454915.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47845487 + ... + 47845496.

It is an arithmetic number, because the mean of its divisors is an integer number (143536476).

Almost surely, 2^478454915 is an apocalyptic number.

478454915 is a deficient number, since it is larger than the sum of its proper divisors (95690989).

478454915 is an equidigital number, since it uses as much as digits as its factorization.

478454915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95690988.

The product of its digits is 806400, while the sum is 47.

The square root of 478454915 is about 21873.6122988408. The cubic root of 478454915 is about 782.1325136338.

The spelling of 478454915 in words is "four hundred seventy-eight million, four hundred fifty-four thousand, nine hundred fifteen".