28756071233 has 2 divisors, whose sum is σ = 28756071234. Its totient is φ = 28756071232.

The previous prime is 28756071229. The next prime is 28756071307. The reversal of 28756071233 is 33217065782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25423664704 + 3332406529 = 159448^2 + 57727^2 .

It is a cyclic number.

It is not a de Polignac number, because 28756071233 - 2² = 28756071229 is a prime.

It is not a weakly prime, because it can be changed into another prime (28756071133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14378035616 + 14378035617.

It is an arithmetic number, because the mean of its divisors is an integer number (14378035617).

Almost surely, 2^28756071233 is an apocalyptic number.

It is an amenable number.

28756071233 is a deficient number, since it is larger than the sum of its proper divisors (1).

28756071233 is an equidigital number, since it uses as much as digits as its factorization.

28756071233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 28756071233 in words is "twenty-eight billion, seven hundred fifty-six million, seventy-one thousand, two hundred thirty-three".