28065065438 has 4 divisors (see below), whose sum is σ = 42097598160. Its totient is φ = 14032532718.

The previous prime is 28065065437. The next prime is 28065065449. The reversal of 28065065438 is 83456056082.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28065065392 and 28065065401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28065065437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7016266358 + ... + 7016266361.

It is an arithmetic number, because the mean of its divisors is an integer number (10524399540).

Almost surely, 2^28065065438 is an apocalyptic number.

28065065438 is a deficient number, since it is larger than the sum of its proper divisors (14032532722).

28065065438 is a wasteful number, since it uses less digits than its factorization.

28065065438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14032532721.

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 28065065438 in words is "twenty-eight billion, sixty-five million, sixty-five thousand, four hundred thirty-eight".