489894636 has 144 divisors (see below), whose sum is σ = 1449797888. Its totient is φ = 126023040.

The previous prime is 489894619. The next prime is 489894637. The reversal of 489894636 is 636498984.

It is not an unprimeable number, because it can be changed into a prime (489894637) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1595595 + ... + 1595901.

Almost surely, 2^489894636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489894636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724898944).

489894636 is an abundant number, since it is smaller than the sum of its proper divisors (959903252).

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

489894636 is a wasteful number, since it uses less digits than its factorization.

489894636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 487 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 57.

The square root of 489894636 is about 22133.5635630596. The cubic root of 489894636 is about 788.3170046495.

The spelling of 489894636 in words is "four hundred eighty-nine million, eight hundred ninety-four thousand, six hundred thirty-six".