28089018723 has 16 divisors (see below), whose sum is σ = 39767448096. Its totient is φ = 17574543360.

The previous prime is 28089018719. The next prime is 28089018799. The reversal of 28089018723 is 32781098082.

It is not a de Polignac number, because 28089018723 - 2² = 28089018719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28089018703) 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 15 ways as a sum of consecutive naturals, for example, 762118 + ... + 798123.

It is an arithmetic number, because the mean of its divisors is an integer number (2485465506).

Almost surely, 2^28089018723 is an apocalyptic number.

28089018723 is a deficient number, since it is larger than the sum of its proper divisors (11678429373).

28089018723 is a wasteful number, since it uses less digits than its factorization.

28089018723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560614.

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 28089018723 in words is "twenty-eight billion, eighty-nine million, eighteen thousand, seven hundred twenty-three".