28713256608 has 96 divisors (see below), whose sum is σ = 80041953600. Its totient is φ = 8987037696.

The previous prime is 28713256597. The next prime is 28713256609. The reversal of 28713256608 is 80665231782.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×28713256608² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (28713256609) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 136458 + ... + 275766.

It is an arithmetic number, because the mean of its divisors is an integer number (833770350).

Almost surely, 2^28713256608 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 28713256608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40020976800).

28713256608 is an abundant number, since it is smaller than the sum of its proper divisors (51328696992).

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

28713256608 is a wasteful number, since it uses less digits than its factorization.

28713256608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139454 (or 139446 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 28713256608 in words is "twenty-eight billion, seven hundred thirteen million, two hundred fifty-six thousand, six hundred eight".