28078766039 has 2 divisors, whose sum is σ = 28078766040. Its totient is φ = 28078766038.

The previous prime is 28078766021. The next prime is 28078766041. The reversal of 28078766039 is 93066787082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28078766039 - 2⁸ = 28078765783 is a prime.

It is a super-3 number, since 3×28078766039³ (a number of 32 digits) contains 333 as substring.

Together with 28078766041, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28078766069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14039383019 + 14039383020.

It is an arithmetic number, because the mean of its divisors is an integer number (14039383020).

Almost surely, 2^28078766039 is an apocalyptic number.

28078766039 is a deficient number, since it is larger than the sum of its proper divisors (1).

28078766039 is an equidigital number, since it uses as much as digits as its factorization.

28078766039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 28078766039 in words is "twenty-eight billion, seventy-eight million, seven hundred sixty-six thousand, thirty-nine".