28081814423 has 32 divisors (see below), whose sum is σ = 31668682752. Its totient is φ = 24732691200.

The previous prime is 28081814417. The next prime is 28081814443. The reversal of 28081814423 is 32441818082.

It is not a de Polignac number, because 28081814423 - 2⁴ = 28081814407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081814443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4803140 + ... + 4808982.

It is an arithmetic number, because the mean of its divisors is an integer number (989646336).

Almost surely, 2^28081814423 is an apocalyptic number.

28081814423 is a deficient number, since it is larger than the sum of its proper divisors (3586868329).

28081814423 is a wasteful number, since it uses less digits than its factorization.

28081814423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6095.

The product of its (nonzero) digits is 98304, while the sum is 41.

The spelling of 28081814423 in words is "twenty-eight billion, eighty-one million, eight hundred fourteen thousand, four hundred twenty-three".