478457 has 4 divisors (see below), whose sum is σ = 546816. Its totient is φ = 410100.

The previous prime is 478453. The next prime is 478459. The reversal of 478457 is 754874.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 478457 - 2² = 478453 is a prime.

It is a super-2 number, since 2×478457² = 457842201698, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 478457.

It is not an unprimeable number, because it can be changed into a prime (478451) 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, 34169 + ... + 34182.

It is an arithmetic number, because the mean of its divisors is an integer number (136704).

2⁴⁷⁸⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

478457 is a deficient number, since it is larger than the sum of its proper divisors (68359).

478457 is an equidigital number, since it uses as much as digits as its factorization.

478457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68358.

The product of its digits is 31360, while the sum is 35.

The square root of 478457 is about 691.7058623432. The cubic root of 478457 is about 78.2133649752.

The spelling of 478457 in words is "four hundred seventy-eight thousand, four hundred fifty-seven".