28888744457173 has 4 divisors (see below), whose sum is σ = 28889450358400. Its totient is φ = 28888038555948.

The previous prime is 28888744457137. The next prime is 28888744457207. The reversal of 28888744457173 is 37175444788882.

It is a happy number.

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 28888744457173 - 2⁹ = 28888744456661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28888744457173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28888844457173) 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, 352889223 + ... + 352971076.

It is an arithmetic number, because the mean of its divisors is an integer number (7222362589600).

Almost surely, 2^{28888744457173} is an apocalyptic number.

It is an amenable number.

28888744457173 is a deficient number, since it is larger than the sum of its proper divisors (705901227).

28888744457173 is an equidigital number, since it uses as much as digits as its factorization.

28888744457173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705901226.

The product of its digits is 2697461760, while the sum is 76.

The spelling of 28888744457173 in words is "twenty-eight trillion, eight hundred eighty-eight billion, seven hundred forty-four million, four hundred fifty-seven thousand, one hundred seventy-three".