478644564 has 12 divisors (see below), whose sum is σ = 1116837344. Its totient is φ = 159548184.

The previous prime is 478644539. The next prime is 478644577. The reversal of 478644564 is 465446874.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19943512 + ... + 19943535.

Almost surely, 2^478644564 is an apocalyptic number.

It is an amenable number.

478644564 is an abundant number, since it is smaller than the sum of its proper divisors (638192780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

478644564 is a wasteful number, since it uses less digits than its factorization.

478644564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39887054 (or 39887052 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 48.

The square root of 478644564 is about 21877.9469786358. The cubic root of 478644564 is about 782.2358400222.

The spelling of 478644564 in words is "four hundred seventy-eight million, six hundred forty-four thousand, five hundred sixty-four".