478644 has 12 divisors (see below), whose sum is σ = 1116864. Its totient is φ = 159544.

The previous prime is 478637. The next prime is 478651. The reversal of 478644 is 446874.

It is an interprime number because it is at equal distance from previous prime (478637) and next prime (478651).

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 478644.

It is an unprimeable number.

478644 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19932 + ... + 19955.

It is an arithmetic number, because the mean of its divisors is an integer number (93072).

2⁴⁷⁸⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

478644 is an abundant number, since it is smaller than the sum of its proper divisors (638220).

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

478644 is a wasteful number, since it uses less digits than its factorization.

478644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39894 (or 39892 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 478644 is about 691.8410222009. The cubic root of 478644 is about 78.2235532779.

The spelling of 478644 in words is "four hundred seventy-eight thousand, six hundred forty-four".