478489 has 4 divisors (see below), whose sum is σ = 522000. Its totient is φ = 434980.

The previous prime is 478483. The next prime is 478493. The reversal of 478489 is 984874.

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 478489 - 2³ = 478481 is a prime.

It is a super-3 number, since 3×478489³ = 328652643133332507, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478481) 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, 21739 + ... + 21760.

It is an arithmetic number, because the mean of its divisors is an integer number (130500).

2⁴⁷⁸⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

478489 is a deficient number, since it is larger than the sum of its proper divisors (43511).

478489 is a wasteful number, since it uses less digits than its factorization.

478489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43510.

The product of its digits is 64512, while the sum is 40.

The square root of 478489 is about 691.7289931758. The cubic root of 478489 is about 78.2151086163.

The spelling of 478489 in words is "four hundred seventy-eight thousand, four hundred eighty-nine".