478686985 has 16 divisors (see below), whose sum is σ = 657770112. Its totient is φ = 327600000.

The previous prime is 478686977. The next prime is 478686997. The reversal of 478686985 is 589686874.

It is not a de Polignac number, because 478686985 - 2³ = 478686977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5110 + ... + 31360.

It is an arithmetic number, because the mean of its divisors is an integer number (41110632).

Almost surely, 2^478686985 is an apocalyptic number.

It is an amenable number.

478686985 is a deficient number, since it is larger than the sum of its proper divisors (179083127).

478686985 is a wasteful number, since it uses less digits than its factorization.

478686985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26784.

The product of its digits is 23224320, while the sum is 61.

The square root of 478686985 is about 21878.9164494040. The cubic root of 478686985 is about 782.2589485031.

The spelling of 478686985 in words is "four hundred seventy-eight million, six hundred eighty-six thousand, nine hundred eighty-five".