489645228 has 12 divisors (see below), whose sum is σ = 1142505560. Its totient is φ = 163215072.

The previous prime is 489645227. The next prime is 489645253. The reversal of 489645228 is 822546984.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (489645223) 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, 20401873 + ... + 20401896.

Almost surely, 2^489645228 is an apocalyptic number.

It is an amenable number.

489645228 is an abundant number, since it is smaller than the sum of its proper divisors (652860332).

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

489645228 is a wasteful number, since it uses less digits than its factorization.

489645228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40803776 (or 40803774 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 48.

The square root of 489645228 is about 22127.9286875207. The cubic root of 489645228 is about 788.1832031284.

The spelling of 489645228 in words is "four hundred eighty-nine million, six hundred forty-five thousand, two hundred twenty-eight".