28722759828 has 72 divisors (see below), whose sum is σ = 78187005792. Its totient is φ = 8182794816.

The previous prime is 28722759773. The next prime is 28722759839. The reversal of 28722759828 is 82895722782.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 133650 + ... + 274422.

It is an arithmetic number, because the mean of its divisors is an integer number (1085930636).

Almost surely, 2^28722759828 is an apocalyptic number.

28722759828 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 28722759828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39093502896).

28722759828 is an abundant number, since it is smaller than the sum of its proper divisors (49464245964).

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

28722759828 is a wasteful number, since it uses less digits than its factorization.

28722759828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141141 (or 141132 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 60.

The spelling of 28722759828 in words is "twenty-eight billion, seven hundred twenty-two million, seven hundred fifty-nine thousand, eight hundred twenty-eight".