990289152 has 108 divisors (see below), whose sum is σ = 2961183680. Its totient is φ = 330075648.

The previous prime is 990289147. The next prime is 990289159. The reversal of 990289152 is 251982099.

It is a tau number, because it is divible by the number of its divisors (108).

It is a junction number, because it is equal to n+sod(n) for n = 990289098 and 990289107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990289159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54249 + ... + 70167.

Almost surely, 2^990289152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990289152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480591840).

990289152 is an abundant number, since it is smaller than the sum of its proper divisors (1970894528).

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

990289152 is an equidigital number, since it uses as much as digits as its factorization.

990289152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15950 (or 15924 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 990289152 is about 31468.8600365504. The cubic root of 990289152 is about 996.7525159300.

The spelling of 990289152 in words is "nine hundred ninety million, two hundred eighty-nine thousand, one hundred fifty-two".