28744288742873 has 6 divisors (see below), whose sum is σ = 31594962006762. Its totient is φ = 26131171584320.

The previous prime is 28744288742863. The next prime is 28744288742887. The reversal of 28744288742873 is 37824788244782.

It can be written as a sum of positive squares in only one way, i.e., 25919828687104 + 2824460055769 = 5091152^2 + 1680613^2 .

It is not a de Polignac number, because 28744288742873 - 2⁶ = 28744288742809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28744288742873.

It is not an unprimeable number, because it can be changed into a prime (28744288742863) 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 5 ways as a sum of consecutive naturals, for example, 118778052536 + ... + 118778052777.

It is an arithmetic number, because the mean of its divisors is an integer number (5265827001127).

Almost surely, 2^{28744288742873} is an apocalyptic number.

It is an amenable number.

28744288742873 is a deficient number, since it is larger than the sum of its proper divisors (2850673263889).

28744288742873 is a wasteful number, since it uses less digits than its factorization.

28744288742873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237556105335 (or 237556105324 counting only the distinct ones).

The product of its digits is 2157969408, while the sum is 74.

The spelling of 28744288742873 in words is "twenty-eight trillion, seven hundred forty-four billion, two hundred eighty-eight million, seven hundred forty-two thousand, eight hundred seventy-three".