28072935389 has 2 divisors, whose sum is σ = 28072935390. Its totient is φ = 28072935388.

The previous prime is 28072935383. The next prime is 28072935403. The reversal of 28072935389 is 98353927082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25680062500 + 2392872889 = 160250^2 + 48917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28072935389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28072935383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14036467694 + 14036467695.

It is an arithmetic number, because the mean of its divisors is an integer number (14036467695).

Almost surely, 2^28072935389 is an apocalyptic number.

It is an amenable number.

28072935389 is a deficient number, since it is larger than the sum of its proper divisors (1).

28072935389 is an equidigital number, since it uses as much as digits as its factorization.

28072935389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 28072935389 in words is "twenty-eight billion, seventy-two million, nine hundred thirty-five thousand, three hundred eighty-nine".