28708727616 has 168 divisors, whose sum is σ = 89828400480. Its totient is φ = 9065820672.

The previous prime is 28708727603. The next prime is 28708727623. The reversal of 28708727616 is 61672780782.

It is a happy number.

28708727616 is a `hidden beast` number, since 287 + 0 + 87 + 276 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246910 + ... + 344066.

It is an arithmetic number, because the mean of its divisors is an integer number (534692860).

Almost surely, 2^28708727616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28708727616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44914200240).

28708727616 is an abundant number, since it is smaller than the sum of its proper divisors (61119672864).

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

28708727616 is an equidigital number, since it uses as much as digits as its factorization.

28708727616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97203 (or 97181 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 28708727616 in words is "twenty-eight billion, seven hundred eight million, seven hundred twenty-seven thousand, six hundred sixteen".