990425088 has 156 divisors (see below), whose sum is σ = 2910819288. Its totient is φ = 324403200.

The previous prime is 990425071. The next prime is 990425099. The reversal of 990425088 is 880524099.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2469688 + ... + 2470088.

It is an arithmetic number, because the mean of its divisors is an integer number (18659098).

Almost surely, 2^990425088 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 990425088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1455409644).

990425088 is an abundant number, since it is smaller than the sum of its proper divisors (1920394200).

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

990425088 is a wasteful number, since it uses less digits than its factorization.

990425088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 990425088 is about 31471.0198118841. The cubic root of 990425088 is about 996.7981215832.

The spelling of 990425088 in words is "nine hundred ninety million, four hundred twenty-five thousand, eighty-eight".