28278566933 has 2 divisors, whose sum is σ = 28278566934. Its totient is φ = 28278566932.

The previous prime is 28278566909. The next prime is 28278566957. The reversal of 28278566933 is 33966587282.

It is a balanced prime because it is at equal distance from previous prime (28278566909) and next prime (28278566957).

It can be written as a sum of positive squares in only one way, i.e., 24524186404 + 3754380529 = 156602^2 + 61273^2 .

It is a cyclic number.

It is not a de Polignac number, because 28278566933 - 2³⁴ = 11098697749 is a prime.

It is a super-2 number, since 2×28278566933² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28278566963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14139283466 + 14139283467.

It is an arithmetic number, because the mean of its divisors is an integer number (14139283467).

Almost surely, 2^28278566933 is an apocalyptic number.

It is an amenable number.

28278566933 is a deficient number, since it is larger than the sum of its proper divisors (1).

28278566933 is an equidigital number, since it uses as much as digits as its factorization.

28278566933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 59.

The spelling of 28278566933 in words is "twenty-eight billion, two hundred seventy-eight million, five hundred sixty-six thousand, nine hundred thirty-three".