28645835729 has 8 divisors (see below), whose sum is σ = 33226726848. Its totient is φ = 24187101840.

The previous prime is 28645835717. The next prime is 28645835791. The reversal of 28645835729 is 92753854682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28645835729 - 2²⁸ = 28377400273 is a prime.

It is a super-2 number, since 2×28645835729² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28645835129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30538802 + ... + 30539739.

It is an arithmetic number, because the mean of its divisors is an integer number (4153340856).

Almost surely, 2^28645835729 is an apocalyptic number.

It is an amenable number.

28645835729 is a deficient number, since it is larger than the sum of its proper divisors (4580891119).

28645835729 is an equidigital number, since it uses as much as digits as its factorization.

28645835729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61078615.

The product of its digits is 29030400, while the sum is 59.

The spelling of 28645835729 in words is "twenty-eight billion, six hundred forty-five million, eight hundred thirty-five thousand, seven hundred twenty-nine".