28756019776 has 189 divisors, whose sum is σ = 65685906601. Its totient is φ = 12480793600.

The previous prime is 28756019713. The next prime is 28756019777. The reversal of 28756019776 is 67791065782.

The square root of 28756019776 is 169576.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1385626176 + 27370393600 = 37224^2 + 165440^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28756019776.

It is not an unprimeable number, because it can be changed into a prime (28756019777) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 611830185 + ... + 611830231.

Almost surely, 2^28756019776 is an apocalyptic number.

28756019776 is the 169576-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28756019776

28756019776 is an abundant number, since it is smaller than the sum of its proper divisors (36929886825).

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

28756019776 is an equidigital number, since it uses as much as digits as its factorization.

28756019776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 28756019776 in words is "twenty-eight billion, seven hundred fifty-six million, nineteen thousand, seven hundred seventy-six".