20728848 has 160 divisors (see below), whose sum is σ = 68567040. Its totient is φ = 5253120.

The previous prime is 20728847. The next prime is 20728859. The reversal of 20728848 is 84882702.

It is not an unprimeable number, because it can be changed into a prime (20728847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108433 + ... + 108623.

It is an arithmetic number, because the mean of its divisors is an integer number (428544).

Almost surely, 2^20728848 is an apocalyptic number.

20728848 is a gapful number since it is divisible by the number (28) 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 20728848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34283520).

20728848 is an abundant number, since it is smaller than the sum of its proper divisors (47838192).

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

20728848 is a wasteful number, since it uses less digits than its factorization.

20728848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 20728848 is about 4552.8944639647. The cubic root of 20728848 is about 274.6998289470.

The spelling of 20728848 in words is "twenty million, seven hundred twenty-eight thousand, eight hundred forty-eight".