6728899980 has 96 divisors (see below), whose sum is σ = 20668919040. Its totient is φ = 1622106880.

The previous prime is 6728899873. The next prime is 6728900011. The reversal of 6728899980 is 899988276.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 89662 + ... + 146618.

It is an arithmetic number, because the mean of its divisors is an integer number (215301240).

Almost surely, 2^6728899980 is an apocalyptic number.

6728899980 is a gapful number since it is divisible by the number (60) 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 6728899980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10334459520).

6728899980 is an abundant number, since it is smaller than the sum of its proper divisors (13940019060).

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

6728899980 is a wasteful number, since it uses less digits than its factorization.

6728899980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57159 (or 57157 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 66.

The square root of 6728899980 is about 82029.8724855769. The cubic root of 6728899980 is about 1887.9103075957.

The spelling of 6728899980 in words is "six billion, seven hundred twenty-eight million, eight hundred ninety-nine thousand, nine hundred eighty".