478990 has 16 divisors (see below), whose sum is σ = 907920. Its totient is φ = 181440.

The previous prime is 478967. The next prime is 478991. The reversal of 478990 is 99874.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478991) 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, 1071 + ... + 1450.

It is an arithmetic number, because the mean of its divisors is an integer number (56745).

2⁴⁷⁸⁹⁹⁰ is an apocalyptic number.

478990 is a deficient number, since it is larger than the sum of its proper divisors (428930).

478990 is a wasteful number, since it uses less digits than its factorization.

478990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 478990 is about 692.0910344745. The cubic root of 478990 is about 78.2423973669.

The spelling of 478990 in words is "four hundred seventy-eight thousand, nine hundred ninety".