28081675438 has 16 divisors (see below), whose sum is σ = 43794132480. Its totient is φ = 13490148600.

The previous prime is 28081675429. The next prime is 28081675439. The reversal of 28081675438 is 83457618082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081675439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1620628 + ... + 1637863.

It is an arithmetic number, because the mean of its divisors is an integer number (2737133280).

Almost surely, 2^28081675438 is an apocalyptic number.

28081675438 is a deficient number, since it is larger than the sum of its proper divisors (15712457042).

28081675438 is a wasteful number, since it uses less digits than its factorization.

28081675438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258663.

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 28081675438 in words is "twenty-eight billion, eighty-one million, six hundred seventy-five thousand, four hundred thirty-eight".