489745440 has 480 divisors, whose sum is σ = 1896846336. Its totient is φ = 118609920.

The previous prime is 489745423. The next prime is 489745441. The reversal of 489745440 is 44547984.

It is a tau number, because it is divible by the number of its divisors (480).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489745441) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9240454 + ... + 9240506.

Almost surely, 2^489745440 is an apocalyptic number.

489745440 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 489745440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948423168).

489745440 is an abundant number, since it is smaller than the sum of its proper divisors (1407100896).

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

489745440 is a wasteful number, since it uses less digits than its factorization.

489745440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 489745440 is about 22130.1929499044. The cubic root of 489745440 is about 788.2369699666.

The spelling of 489745440 in words is "four hundred eighty-nine million, seven hundred forty-five thousand, four hundred forty".