28287165073 has 4 divisors (see below), whose sum is σ = 28289018368. Its totient is φ = 28285311780.

The previous prime is 28287165019. The next prime is 28287165083. The reversal of 28287165073 is 37056178282.

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 a de Polignac number, because none of the positive numbers 2^k-28287165073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28287165083) 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, 903561 + ... + 934342.

It is an arithmetic number, because the mean of its divisors is an integer number (7072254592).

Almost surely, 2^28287165073 is an apocalyptic number.

It is an amenable number.

28287165073 is a deficient number, since it is larger than the sum of its proper divisors (1853295).

28287165073 is a wasteful number, since it uses less digits than its factorization.

28287165073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853294.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 28287165073 in words is "twenty-eight billion, two hundred eighty-seven million, one hundred sixty-five thousand, seventy-three".