28873611073493 has 4 divisors (see below), whose sum is σ = 28873948007340. Its totient is φ = 28873274139648.

The previous prime is 28873611073481. The next prime is 28873611073529. The reversal of 28873611073493 is 39437011637882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7752398881969 + 21121212191524 = 2784313^2 + 4595782^2 .

It is a cyclic number.

It is not a de Polignac number, because 28873611073493 - 2⁴⁰ = 27774099445717 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 (28873611073393) 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 3 ways as a sum of consecutive naturals, for example, 168338348 + ... + 168509781.

It is an arithmetic number, because the mean of its divisors is an integer number (7218487001835).

Almost surely, 2^{28873611073493} is an apocalyptic number.

It is an amenable number.

28873611073493 is a deficient number, since it is larger than the sum of its proper divisors (336933847).

28873611073493 is an equidigital number, since it uses as much as digits as its factorization.

28873611073493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336933846.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 28873611073493 in words is "twenty-eight trillion, eight hundred seventy-three billion, six hundred eleven million, seventy-three thousand, four hundred ninety-three".