28528363656 has 192 divisors, whose sum is σ = 87783696000. Its totient is φ = 8297303040.

The previous prime is 28528363649. The next prime is 28528363679. The reversal of 28528363656 is 65636382582.

28528363656 is a `hidden beast` number, since 2 + 8 + 528 + 3 + 63 + 6 + 56 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9263925 + ... + 9267003.

It is an arithmetic number, because the mean of its divisors is an integer number (457206750).

Almost surely, 2^28528363656 is an apocalyptic number.

28528363656 is a gapful number since it is divisible by the number (26) 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 28528363656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43891848000).

28528363656 is an abundant number, since it is smaller than the sum of its proper divisors (59255332344).

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

28528363656 is a wasteful number, since it uses less digits than its factorization.

28528363656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644 (or 3637 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 54.

The spelling of 28528363656 in words is "twenty-eight billion, five hundred twenty-eight million, three hundred sixty-three thousand, six hundred fifty-six".