28112285729 has 8 divisors (see below), whose sum is σ = 30670890240. Its totient is φ = 25554171600.

The previous prime is 28112285711. The next prime is 28112285743. The reversal of 28112285729 is 92758221182.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28112285729 - 2¹² = 28112281633 is a prime.

It is a super-2 number, since 2×28112285729² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28112285779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2864 + ... + 237134.

It is an arithmetic number, because the mean of its divisors is an integer number (3833861280).

Almost surely, 2^28112285729 is an apocalyptic number.

It is an amenable number.

28112285729 is a deficient number, since it is larger than the sum of its proper divisors (2558604511).

28112285729 is a wasteful number, since it uses less digits than its factorization.

28112285729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245191.

The product of its digits is 322560, while the sum is 47.

The spelling of 28112285729 in words is "twenty-eight billion, one hundred twelve million, two hundred eighty-five thousand, seven hundred twenty-nine".