28296726077 has 2 divisors, whose sum is σ = 28296726078. Its totient is φ = 28296726076.

The previous prime is 28296726061. The next prime is 28296726103. The reversal of 28296726077 is 77062769282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21345502201 + 6951223876 = 146101^2 + 83374^2 .

It is a cyclic number.

It is not a de Polignac number, because 28296726077 - 2⁴ = 28296726061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28296726377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14148363038 + 14148363039.

It is an arithmetic number, because the mean of its divisors is an integer number (14148363039).

Almost surely, 2^28296726077 is an apocalyptic number.

It is an amenable number.

28296726077 is a deficient number, since it is larger than the sum of its proper divisors (1).

28296726077 is an equidigital number, since it uses as much as digits as its factorization.

28296726077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7112448, while the sum is 56.

The spelling of 28296726077 in words is "twenty-eight billion, two hundred ninety-six million, seven hundred twenty-six thousand, seventy-seven".