489987990 has 96 divisors (see below), whose sum is σ = 1305720000. Its totient is φ = 127445760.

The previous prime is 489987961. The next prime is 489987997. The reversal of 489987990 is 99789984.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489987997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 817711 + ... + 818309.

It is an arithmetic number, because the mean of its divisors is an integer number (13601250).

Almost surely, 2^489987990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489987990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (652860000).

489987990 is an abundant number, since it is smaller than the sum of its proper divisors (815732010).

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

489987990 is a wasteful number, since it uses less digits than its factorization.

489987990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

The square root of 489987990 is about 22135.6723412685. The cubic root of 489987990 is about 788.3670751926.

The spelling of 489987990 in words is "four hundred eighty-nine million, nine hundred eighty-seven thousand, nine hundred ninety".