478385887 has 4 divisors (see below), whose sum is σ = 546726736. Its totient is φ = 410045040.

The previous prime is 478385867. The next prime is 478385891. The reversal of 478385887 is 788583874.

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-478385887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478385837) 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, 34170414 + ... + 34170427.

It is an arithmetic number, because the mean of its divisors is an integer number (136681684).

Almost surely, 2^478385887 is an apocalyptic number.

478385887 is a deficient number, since it is larger than the sum of its proper divisors (68340849).

478385887 is an equidigital number, since it uses as much as digits as its factorization.

478385887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68340848.

The product of its digits is 12042240, while the sum is 58.

The square root of 478385887 is about 21872.0343589708. The cubic root of 478385887 is about 782.0948983587.

The spelling of 478385887 in words is "four hundred seventy-eight million, three hundred eighty-five thousand, eight hundred eighty-seven".