478634 has 16 divisors (see below), whose sum is σ = 793800. Its totient is φ = 215040.

The previous prime is 478631. The next prime is 478637. The reversal of 478634 is 436874.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (478631) and next prime (478637).

It can be written as a sum of positive squares in 4 ways, for example, as 225625 + 253009 = 475^2 + 503^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 478634.

It is not an unprimeable number, because it can be changed into a prime (478631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 842 + ... + 1290.

2⁴⁷⁸⁶³⁴ is an apocalyptic number.

478634 is a deficient number, since it is larger than the sum of its proper divisors (315166).

478634 is a wasteful number, since it uses less digits than its factorization.

478634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its digits is 16128, while the sum is 32.

The square root of 478634 is about 691.8337950693. The cubic root of 478634 is about 78.2230085160.

The spelling of 478634 in words is "four hundred seventy-eight thousand, six hundred thirty-four".