478306985 has 16 divisors (see below), whose sum is σ = 654481296. Its totient is φ = 332433408.

The previous prime is 478306981. The next prime is 478307059. The reversal of 478306985 is 589603874.

It can be written as a sum of positive squares in 8 ways, for example, as 5331481 + 472975504 = 2309^2 + 21748^2 .

It is a cyclic number.

It is not a de Polignac number, because 478306985 - 2² = 478306981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478306981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215324 + ... + 217533.

It is an arithmetic number, because the mean of its divisors is an integer number (40905081).

Almost surely, 2^478306985 is an apocalyptic number.

It is an amenable number.

478306985 is a deficient number, since it is larger than the sum of its proper divisors (176174311).

478306985 is a wasteful number, since it uses less digits than its factorization.

478306985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432892.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 478306985 is about 21870.2305657714. The cubic root of 478306985 is about 782.0518980346.

The spelling of 478306985 in words is "four hundred seventy-eight million, three hundred six thousand, nine hundred eighty-five".