28021124073 has 4 divisors (see below), whose sum is σ = 37361498768. Its totient is φ = 18680749380.

The previous prime is 28021124059. The next prime is 28021124081. The reversal of 28021124073 is 37042112082.

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 not a de Polignac number, because 28021124073 - 2⁵ = 28021124041 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 28021124073.

It is not an unprimeable number, because it can be changed into a prime (28021124773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4670187343 + ... + 4670187348.

It is an arithmetic number, because the mean of its divisors is an integer number (9340374692).

Almost surely, 2^28021124073 is an apocalyptic number.

It is an amenable number.

28021124073 is a deficient number, since it is larger than the sum of its proper divisors (9340374695).

28021124073 is an equidigital number, since it uses as much as digits as its factorization.

28021124073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9340374694.

The product of its (nonzero) digits is 5376, while the sum is 30.

The spelling of 28021124073 in words is "twenty-eight billion, twenty-one million, one hundred twenty-four thousand, seventy-three".