28078575233 has 2 divisors, whose sum is σ = 28078575234. Its totient is φ = 28078575232.

The previous prime is 28078575167. The next prime is 28078575247. The reversal of 28078575233 is 33257587082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17068899904 + 11009675329 = 130648^2 + 104927^2 .

It is a cyclic number.

It is not a de Polignac number, because 28078575233 - 2³⁰ = 27004833409 is a prime.

It is not a weakly prime, because it can be changed into another prime (28078575433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14039287616 + 14039287617.

It is an arithmetic number, because the mean of its divisors is an integer number (14039287617).

Almost surely, 2^28078575233 is an apocalyptic number.

It is an amenable number.

28078575233 is a deficient number, since it is larger than the sum of its proper divisors (1).

28078575233 is an equidigital number, since it uses as much as digits as its factorization.

28078575233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 28078575233 in words is "twenty-eight billion, seventy-eight million, five hundred seventy-five thousand, two hundred thirty-three".