28390847273 has 4 divisors (see below), whose sum is σ = 29306681088. Its totient is φ = 27475013460.

The previous prime is 28390847201. The next prime is 28390847279. The reversal of 28390847273 is 37274809382.

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 28390847273 - 2³⁴ = 11210978089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28390847279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457916861 + ... + 457916922.

It is an arithmetic number, because the mean of its divisors is an integer number (7326670272).

Almost surely, 2^28390847273 is an apocalyptic number.

It is an amenable number.

28390847273 is a deficient number, since it is larger than the sum of its proper divisors (915833815).

28390847273 is an equidigital number, since it uses as much as digits as its factorization.

28390847273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915833814.

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 28390847273 in words is "twenty-eight billion, three hundred ninety million, eight hundred forty-seven thousand, two hundred seventy-three".