489447840 has 384 divisors, whose sum is σ = 1882718208. Its totient is φ = 104509440.

The previous prime is 489447839. The next prime is 489447841. The reversal of 489447840 is 48744984.

It is an interprime number because it is at equal distance from previous prime (489447839) and next prime (489447841).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 489447840.

It is not an unprimeable number, because it can be changed into a prime (489447841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3853857 + ... + 3853983.

It is an arithmetic number, because the mean of its divisors is an integer number (4902912).

Almost surely, 2^489447840 is an apocalyptic number.

489447840 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 489447840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941359104).

489447840 is an abundant number, since it is smaller than the sum of its proper divisors (1393270368).

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

489447840 is a wasteful number, since it uses less digits than its factorization.

489447840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The square root of 489447840 is about 22123.4680825588. The cubic root of 489447840 is about 788.0772769001.

The spelling of 489447840 in words is "four hundred eighty-nine million, four hundred forty-seven thousand, eight hundred forty".