489123636 has 12 divisors (see below), whose sum is σ = 1141288512. Its totient is φ = 163041208.

The previous prime is 489123577. The next prime is 489123637. The reversal of 489123636 is 636321984.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489123637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20380140 + ... + 20380163.

It is an arithmetic number, because the mean of its divisors is an integer number (95107376).

Almost surely, 2^489123636 is an apocalyptic number.

It is an amenable number.

489123636 is an abundant number, since it is smaller than the sum of its proper divisors (652164876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

489123636 is a wasteful number, since it uses less digits than its factorization.

489123636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40760310 (or 40760308 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 489123636 is about 22116.1397174100. The cubic root of 489123636 is about 787.9032343579.

The spelling of 489123636 in words is "four hundred eighty-nine million, one hundred twenty-three thousand, six hundred thirty-six".