28145430756 has 27 divisors (see below), whose sum is σ = 71147938953. Its totient is φ = 9381474720.

The previous prime is 28145430701. The next prime is 28145430757. The reversal of 28145430756 is 65703454182.

The square root of 28145430756 is 167766.

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

28145430756 is a `hidden beast` number, since 2 + 8 + 145 + 430 + 75 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6571696356 + 21573734400 = 81066^2 + 146880^2 .

It is not an unprimeable number, because it can be changed into a prime (28145430757) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 992616 + ... + 1020576.

Almost surely, 2^28145430756 is an apocalyptic number.

28145430756 is the 167766-th square number.

It is an amenable number.

28145430756 is an abundant number, since it is smaller than the sum of its proper divisors (43002508197).

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

28145430756 is an frugal number, since it uses more digits than its factorization.

28145430756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55932 (or 27966 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 28145430756 in words is "twenty-eight billion, one hundred forty-five million, four hundred thirty thousand, seven hundred fifty-six".