28731247309159 has 8 divisors (see below), whose sum is σ = 30421402593120. Its totient is φ = 27041101126656.

The previous prime is 28731247309123. The next prime is 28731247309181. The reversal of 28731247309159 is 95190374213782.

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 28731247309159 - 2⁷ = 28731247309031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28731247309097 and 28731247309106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28731247309859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4863927 + ... + 9006679.

It is an arithmetic number, because the mean of its divisors is an integer number (3802675324140).

Almost surely, 2^{28731247309159} is an apocalyptic number.

28731247309159 is a deficient number, since it is larger than the sum of its proper divisors (1690155283961).

28731247309159 is a wasteful number, since it uses less digits than its factorization.

28731247309159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550729.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 28731247309159 in words is "twenty-eight trillion, seven hundred thirty-one billion, two hundred forty-seven million, three hundred nine thousand, one hundred fifty-nine".