9998490 has 16 divisors (see below), whose sum is σ = 23996448. Its totient is φ = 2666256.

The previous prime is 9998479. The next prime is 9998539. The reversal of 9998490 is 948999.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166612 + ... + 166671.

It is an arithmetic number, because the mean of its divisors is an integer number (1499778).

Almost surely, 2^9998490 is an apocalyptic number.

9998490 is an abundant number, since it is smaller than the sum of its proper divisors (13997958).

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

9998490 is a wasteful number, since it uses less digits than its factorization.

9998490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333293.

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

The square root of 9998490 is about 3162.0388991915. The cubic root of 9998490 is about 215.4326244694.

It can be divided in two parts, 99 and 98490, that added together give a palindrome (98589).

The spelling of 9998490 in words is "nine million, nine hundred ninety-eight thousand, four hundred ninety".