28529732745 has 12 divisors (see below), whose sum is σ = 49451536836. Its totient is φ = 15215857440.

The previous prime is 28529732719. The next prime is 28529732747. The reversal of 28529732745 is 54723792582.

28529732745 is a `hidden beast` number, since 2 + 8 + 529 + 73 + 2 + 7 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13583203209 + 14946529536 = 116547^2 + 122256^2 .

It is not a de Polignac number, because 28529732745 - 2⁸ = 28529732489 is a prime.

It is a super-2 number, since 2×28529732745² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28529732691 and 28529732700.

It is not an unprimeable number, because it can be changed into a prime (28529732747) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 316996986 + ... + 316997075.

It is an arithmetic number, because the mean of its divisors is an integer number (4120961403).

Almost surely, 2^28529732745 is an apocalyptic number.

It is an amenable number.

28529732745 is a deficient number, since it is larger than the sum of its proper divisors (20921804091).

28529732745 is a wasteful number, since it uses less digits than its factorization.

28529732745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633994072 (or 633994069 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The spelling of 28529732745 in words is "twenty-eight billion, five hundred twenty-nine million, seven hundred thirty-two thousand, seven hundred forty-five".