489445320 has 384 divisors, whose sum is σ = 1942012800. Its totient is φ = 97542144.

The previous prime is 489445309. The next prime is 489445321. The reversal of 489445320 is 23544984.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489445321) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1452192 + ... + 1452528.

It is an arithmetic number, because the mean of its divisors is an integer number (5057325).

Almost surely, 2^489445320 is an apocalyptic number.

489445320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489445320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (971006400).

489445320 is an abundant number, since it is smaller than the sum of its proper divisors (1452567480).

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

489445320 is a wasteful number, since it uses less digits than its factorization.

489445320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 489445320 is about 22123.4111293896. The cubic root of 489445320 is about 788.0759243841.

The spelling of 489445320 in words is "four hundred eighty-nine million, four hundred forty-five thousand, three hundred twenty".