9990498 has 32 divisors (see below), whose sum is σ = 23132160. Its totient is φ = 2817360.

The previous prime is 9990493. The next prime is 9990499. The reversal of 9990498 is 8940999.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9990493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1813 + ... + 4823.

It is an arithmetic number, because the mean of its divisors is an integer number (722880).

Almost surely, 2^9990498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9990498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11566080).

9990498 is an abundant number, since it is smaller than the sum of its proper divisors (13141662).

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

9990498 is a wasteful number, since it uses less digits than its factorization.

9990498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 9990498 is about 3160.7749049877. The cubic root of 9990498 is about 215.3752092504.

The spelling of 9990498 in words is "nine million, nine hundred ninety thousand, four hundred ninety-eight".