99998280 has 128 divisors (see below), whose sum is σ = 339811200. Its totient is φ = 26148096.

The previous prime is 99998257. The next prime is 99998291. The reversal of 99998280 is 8289999.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56367 + ... + 58113.

It is an arithmetic number, because the mean of its divisors is an integer number (2654775).

Almost surely, 2^99998280 is an apocalyptic number.

99998280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99998280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169905600).

99998280 is an abundant number, since it is smaller than the sum of its proper divisors (239812920).

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

99998280 is a wasteful number, since it uses less digits than its factorization.

99998280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820 (or 1810 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 99998280 is about 9999.9139996302. The cubic root of 99998280 is about 464.1562221684.

The spelling of 99998280 in words is "ninety-nine million, nine hundred ninety-eight thousand, two hundred eighty".