28728386651 has 2 divisors, whose sum is σ = 28728386652. Its totient is φ = 28728386650.

The previous prime is 28728386623. The next prime is 28728386653. The reversal of 28728386651 is 15668382782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28728386651 - 2⁶ = 28728386587 is a prime.

Together with 28728386653, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28728386653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14364193325 + 14364193326.

It is an arithmetic number, because the mean of its divisors is an integer number (14364193326).

Almost surely, 2^28728386651 is an apocalyptic number.

28728386651 is a deficient number, since it is larger than the sum of its proper divisors (1).

28728386651 is an equidigital number, since it uses as much as digits as its factorization.

28728386651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 56.

The spelling of 28728386651 in words is "twenty-eight billion, seven hundred twenty-eight million, three hundred eighty-six thousand, six hundred fifty-one".