28731809135029 has 144 divisors (see below), whose sum is σ = 41514979590144. Its totient is φ = 19302561532800.

The previous prime is 28731809135027. The next prime is 28731809135047. The reversal of 28731809135029 is 92053190813782.

It is a happy number.

It is not a de Polignac number, because 28731809135029 - 2¹ = 28731809135027 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28731809135027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 333493132 + ... + 333579274.

It is an arithmetic number, because the mean of its divisors is an integer number (288298469376).

Almost surely, 2^{28731809135029} is an apocalyptic number.

It is an amenable number.

28731809135029 is a deficient number, since it is larger than the sum of its proper divisors (12783170455115).

28731809135029 is a wasteful number, since it uses less digits than its factorization.

28731809135029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86296 (or 86264 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 28731809135029 in words is "twenty-eight trillion, seven hundred thirty-one billion, eight hundred nine million, one hundred thirty-five thousand, twenty-nine".