478738 has 8 divisors (see below), whose sum is σ = 773388. Its totient is φ = 220944.

The previous prime is 478729. The next prime is 478739. The reversal of 478738 is 837874.

It can be written as a sum of positive squares in 2 ways, for example, as 431649 + 47089 = 657^2 + 217^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 478697 and 478706.

It is not an unprimeable number, because it can be changed into a prime (478739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9181 + ... + 9232.

2⁴⁷⁸⁷³⁸ is an apocalyptic number.

478738 is a deficient number, since it is larger than the sum of its proper divisors (294650).

478738 is a wasteful number, since it uses less digits than its factorization.

478738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18428.

The product of its digits is 37632, while the sum is 37.

The square root of 478738 is about 691.9089535481. The cubic root of 478738 is about 78.2286736685.

The spelling of 478738 in words is "four hundred seventy-eight thousand, seven hundred thirty-eight".