1098206720 has 80 divisors (see below), whose sum is σ = 2835756000. Its totient is φ = 405479424.

The previous prime is 1098206717. The next prime is 1098206723. The reversal of 1098206720 is 276028901.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1098206717) and next prime (1098206723).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098206723) 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 7 ways as a sum of consecutive naturals, for example, 16781 + ... + 49779.

It is an arithmetic number, because the mean of its divisors is an integer number (35446950).

Almost surely, 2^1098206720 is an apocalyptic number.

1098206720 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 1098206720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1417878000).

1098206720 is an abundant number, since it is smaller than the sum of its proper divisors (1737549280).

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

1098206720 is an equidigital number, since it uses as much as digits as its factorization.

1098206720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33035 (or 33019 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1098206720 is about 33139.2021629972. The cubic root of 1098206720 is about 1031.7188505608.

The spelling of 1098206720 in words is "one billion, ninety-eight million, two hundred six thousand, seven hundred twenty".