1098998880 has 192 divisors, whose sum is σ = 4128703488. Its totient is φ = 240261120.

The previous prime is 1098998869. The next prime is 1098998939. The reversal of 1098998880 is 888998901.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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, 70170 + ... + 84390.

It is an arithmetic number, because the mean of its divisors is an integer number (21503664).

Almost surely, 2^1098998880 is an apocalyptic number.

1098998880 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 1098998880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2064351744).

1098998880 is an abundant number, since it is smaller than the sum of its proper divisors (3029704608).

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

1098998880 is a wasteful number, since it uses less digits than its factorization.

1098998880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14269 (or 14261 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 60.

The square root of 1098998880 is about 33151.1520161819. The cubic root of 1098998880 is about 1031.9668578985.

The spelling of 1098998880 in words is "one billion, ninety-eight million, nine hundred ninety-eight thousand, eight hundred eighty".