489747990 has 128 divisors (see below), whose sum is σ = 1283143680. Its totient is φ = 119232000.

The previous prime is 489747919. The next prime is 489747991. The reversal of 489747990 is 99747984.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 489747990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489747991) 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, 2705700 + ... + 2705880.

It is an arithmetic number, because the mean of its divisors is an integer number (10024560).

Almost surely, 2^489747990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489747990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (641571840).

489747990 is an abundant number, since it is smaller than the sum of its proper divisors (793395690).

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

489747990 is a wasteful number, since it uses less digits than its factorization.

489747990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 489747990 is about 22130.2505634256. The cubic root of 489747990 is about 788.2383380248.

The spelling of 489747990 in words is "four hundred eighty-nine million, seven hundred forty-seven thousand, nine hundred ninety".