489728988 has 72 divisors (see below), whose sum is σ = 1417284960. Its totient is φ = 139674240.

The previous prime is 489728983. The next prime is 489729007. The reversal of 489728988 is 889827984.

It is a happy number.

489728988 is a `hidden beast` number, since 489 + 72 + 8 + 9 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489728983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177298 + ... + 180038.

Almost surely, 2^489728988 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 489728988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708642480).

489728988 is an abundant number, since it is smaller than the sum of its proper divisors (927555972).

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

489728988 is a wasteful number, since it uses less digits than its factorization.

489728988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3467 (or 3462 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 63.

The square root of 489728988 is about 22129.8212374163. The cubic root of 489728988 is about 788.2281434629.

The spelling of 489728988 in words is "four hundred eighty-nine million, seven hundred twenty-eight thousand, nine hundred eighty-eight".