28731871873033 has 4 divisors (see below), whose sum is σ = 32836424997760. Its totient is φ = 24627318748308.

The previous prime is 28731871873031. The next prime is 28731871873069. The reversal of 28731871873033 is 33037817813782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28731871873033 - 2¹ = 28731871873031 is a prime.

It is a super-2 number, since 2×28731871873033² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28731871873031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2052276562353 + ... + 2052276562366.

It is an arithmetic number, because the mean of its divisors is an integer number (8209106249440).

Almost surely, 2^{28731871873033} is an apocalyptic number.

It is an amenable number.

28731871873033 is a deficient number, since it is larger than the sum of its proper divisors (4104553124727).

28731871873033 is an equidigital number, since it uses as much as digits as its factorization.

28731871873033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104553124726.

The product of its (nonzero) digits is 28449792, while the sum is 61.

The spelling of 28731871873033 in words is "twenty-eight trillion, seven hundred thirty-one billion, eight hundred seventy-one million, eight hundred seventy-three thousand, thirty-three".