478428871 has 4 divisors (see below), whose sum is σ = 478499112. Its totient is φ = 478358632.

The previous prime is 478428869. The next prime is 478428893. The reversal of 478428871 is 178824874.

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

It is a cyclic number.

It is not a de Polignac number, because 478428871 - 2¹ = 478428869 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478428851) 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, 23656 + ... + 38941.

It is an arithmetic number, because the mean of its divisors is an integer number (119624778).

Almost surely, 2^478428871 is an apocalyptic number.

478428871 is a deficient number, since it is larger than the sum of its proper divisors (70241).

478428871 is an equidigital number, since it uses as much as digits as its factorization.

478428871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70240.

The product of its digits is 802816, while the sum is 49.

The square root of 478428871 is about 21873.0169615442. The cubic root of 478428871 is about 782.1183219596.

The spelling of 478428871 in words is "four hundred seventy-eight million, four hundred twenty-eight thousand, eight hundred seventy-one".