1098209280 has 192 divisors, whose sum is σ = 4016113920. Its totient is φ = 250970112.

The previous prime is 1098209269. The next prime is 1098209297. The reversal of 1098209280 is 829028901.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212487 + ... + 217593.

It is an arithmetic number, because the mean of its divisors is an integer number (20917260).

Almost surely, 2^1098209280 is an apocalyptic number.

1098209280 is a gapful number since it is divisible by the number (10) 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 1098209280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2008056960).

1098209280 is an abundant number, since it is smaller than the sum of its proper divisors (2917904640).

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

1098209280 is an equidigital number, since it uses as much as digits as its factorization.

1098209280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144 (or 5124 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1098209280 is about 33139.2407879239. The cubic root of 1098209280 is about 1031.7196522308.

The spelling of 1098209280 in words is "one billion, ninety-eight million, two hundred nine thousand, two hundred eighty".