478645 has 8 divisors (see below), whose sum is σ = 594360. Its totient is φ = 369600.

The previous prime is 478637. The next prime is 478651. The reversal of 478645 is 546874.

It can be written as a sum of positive squares in 4 ways, for example, as 14884 + 463761 = 122^2 + 681^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 478645 - 2³ = 478637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1506 + ... + 1795.

It is an arithmetic number, because the mean of its divisors is an integer number (74295).

2⁴⁷⁸⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

478645 is a deficient number, since it is larger than the sum of its proper divisors (115715).

478645 is a wasteful number, since it uses less digits than its factorization.

478645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335.

The product of its digits is 26880, while the sum is 34.

The square root of 478645 is about 691.8417449099. The cubic root of 478645 is about 78.2236077536.

The spelling of 478645 in words is "four hundred seventy-eight thousand, six hundred forty-five".