489778 has 4 divisors (see below), whose sum is σ = 734670. Its totient is φ = 244888.

The previous prime is 489761. The next prime is 489791. The reversal of 489778 is 877984.

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., 485809 + 3969 = 697^2 + 63^2 .

It is an unprimeable number.

489778 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 122443 + ... + 122446.

2⁴⁸⁹⁷⁷⁸ is an apocalyptic number.

489778 is a deficient number, since it is larger than the sum of its proper divisors (244892).

489778 is a wasteful number, since it uses less digits than its factorization.

489778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244891.

The product of its digits is 112896, while the sum is 43.

The square root of 489778 is about 699.8414106067. The cubic root of 489778 is about 78.8254437835.

The spelling of 489778 in words is "four hundred eighty-nine thousand, seven hundred seventy-eight".