28288785233 has 2 divisors, whose sum is σ = 28288785234. Its totient is φ = 28288785232.

The previous prime is 28288785181. The next prime is 28288785253. The reversal of 28288785233 is 33258788282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24978854209 + 3309931024 = 158047^2 + 57532^2 .

It is a cyclic number.

It is not a de Polignac number, because 28288785233 - 2⁸ = 28288784977 is a prime.

It is not a weakly prime, because it can be changed into another prime (28288785253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144392616 + 14144392617.

It is an arithmetic number, because the mean of its divisors is an integer number (14144392617).

Almost surely, 2^28288785233 is an apocalyptic number.

It is an amenable number.

28288785233 is a deficient number, since it is larger than the sum of its proper divisors (1).

28288785233 is an equidigital number, since it uses as much as digits as its factorization.

28288785233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10321920, while the sum is 56.

The spelling of 28288785233 in words is "twenty-eight billion, two hundred eighty-eight million, seven hundred eighty-five thousand, two hundred thirty-three".