28682756640 has 96 divisors (see below), whose sum is σ = 100389663360. Its totient is φ = 7648733952.

The previous prime is 28682756633. The next prime is 28682756653. The reversal of 28682756640 is 4665728682.

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3315444 + ... + 3324083.

It is an arithmetic number, because the mean of its divisors is an integer number (1045725660).

Almost surely, 2^28682756640 is an apocalyptic number.

28682756640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28682756640 is an abundant number, since it is smaller than the sum of its proper divisors (71706906720).

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

28682756640 is a wasteful number, since it uses less digits than its factorization.

28682756640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639551 (or 6639537 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 28682756640 in words is "twenty-eight billion, six hundred eighty-two million, seven hundred fifty-six thousand, six hundred forty".