998849280 has 576 divisors, whose sum is σ = 4005324288. Its totient is φ = 208404480.

The previous prime is 998849249. The next prime is 998849287. The reversal of 998849280 is 82948899.

It is a self number, because there is not a number n which added to its sum of digits gives 998849280.

It is not an unprimeable number, because it can be changed into a prime (998849287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9334987 + ... + 9335093.

It is an arithmetic number, because the mean of its divisors is an integer number (6953688).

Almost surely, 2^998849280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998849280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2002662144).

998849280 is an abundant number, since it is smaller than the sum of its proper divisors (3006475008).

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

998849280 is a wasteful number, since it uses less digits than its factorization.

998849280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 57.

The square root of 998849280 is about 31604.5768837363. The cubic root of 998849280 is about 999.6162794440.

The spelling of 998849280 in words is "nine hundred ninety-eight million, eight hundred forty-nine thousand, two hundred eighty".