28778235683 has 2 divisors, whose sum is σ = 28778235684. Its totient is φ = 28778235682.

The previous prime is 28778235679. The next prime is 28778235721. The reversal of 28778235683 is 38653287782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28778235683 - 2² = 28778235679 is a prime.

It is not a weakly prime, because it can be changed into another prime (28778232683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14389117841 + 14389117842.

It is an arithmetic number, because the mean of its divisors is an integer number (14389117842).

Almost surely, 2^28778235683 is an apocalyptic number.

28778235683 is a deficient number, since it is larger than the sum of its proper divisors (1).

28778235683 is an equidigital number, since it uses as much as digits as its factorization.

28778235683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27095040, while the sum is 59.

The spelling of 28778235683 in words is "twenty-eight billion, seven hundred seventy-eight million, two hundred thirty-five thousand, six hundred eighty-three".