9998280 has 48 divisors (see below), whose sum is σ = 32495580. Its totient is φ = 2666112.

The previous prime is 9998279. The next prime is 9998281. The reversal of 9998280 is 828999.

It is an interprime number because it is at equal distance from previous prime (9998279) and next prime (9998281).

It can be written as a sum of positive squares in 2 ways, for example, as 9998244 + 36 = 3162^2 + 6^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (9998281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13527 + ... + 14246.

Almost surely, 2^9998280 is an apocalyptic number.

9998280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9998280 is an abundant number, since it is smaller than the sum of its proper divisors (22497300).

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

9998280 is a wasteful number, since it uses less digits than its factorization.

9998280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27790 (or 27783 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 9998280 is about 3162.0056925945. The cubic root of 9998280 is about 215.4311162027.

The spelling of 9998280 in words is "nine million, nine hundred ninety-eight thousand, two hundred eighty".