9998920 has 16 divisors (see below), whose sum is σ = 22497660. Its totient is φ = 3999552.

The previous prime is 9998903. The next prime is 9998929. The reversal of 9998920 is 298999.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9998244 + 676 = 3162^2 + 26^2 .

It is not an unprimeable number, because it can be changed into a prime (9998929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124947 + ... + 125026.

Almost surely, 2^9998920 is an apocalyptic number.

It is an amenable number.

9998920 is an abundant number, since it is smaller than the sum of its proper divisors (12498740).

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

9998920 is a wasteful number, since it uses less digits than its factorization.

9998920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249984 (or 249980 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 9998920 is about 3162.1068925639. The cubic root of 9998920 is about 215.4357127591.

The spelling of 9998920 in words is "nine million, nine hundred ninety-eight thousand, nine hundred twenty".