478658 has 4 divisors (see below), whose sum is σ = 717990. Its totient is φ = 239328.

The previous prime is 478651. The next prime is 478679. The reversal of 478658 is 856874.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 380689 + 97969 = 617^2 + 313^2 .

It is a super-2 number, since 2×478658² = 458226961928, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478651) by changing a digit.

478658 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119663 + ... + 119666.

2⁴⁷⁸⁶⁵⁸ is an apocalyptic number.

478658 is a deficient number, since it is larger than the sum of its proper divisors (239332).

478658 is a wasteful number, since it uses less digits than its factorization.

478658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239331.

The product of its digits is 53760, while the sum is 38.

The square root of 478658 is about 691.8511400583. The cubic root of 478658 is about 78.2243159317.

The spelling of 478658 in words is "four hundred seventy-eight thousand, six hundred fifty-eight".