489437640 has 160 divisors (see below), whose sum is σ = 1702107000. Its totient is φ = 125991936.

The previous prime is 489437639. The next prime is 489437647. The reversal of 489437640 is 46734984.

It can be written as a sum of positive squares in 4 ways, for example, as 481451364 + 7986276 = 21942^2 + 2826^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (489437647) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 91356 + ... + 96564.

Almost surely, 2^489437640 is an apocalyptic number.

489437640 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 489437640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851053500).

489437640 is an abundant number, since it is smaller than the sum of its proper divisors (1212669360).

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

489437640 is a wasteful number, since it uses less digits than its factorization.

489437640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261 (or 5248 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 489437640 is about 22123.2375569219. The cubic root of 489437640 is about 788.0718024018.

The spelling of 489437640 in words is "four hundred eighty-nine million, four hundred thirty-seven thousand, six hundred forty".