28247076877 has 2 divisors, whose sum is σ = 28247076878. Its totient is φ = 28247076876.

The previous prime is 28247076817. The next prime is 28247076881. The reversal of 28247076877 is 77867074282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21734425476 + 6512651401 = 147426^2 + 80701^2 .

It is a cyclic number.

It is not a de Polignac number, because 28247076877 - 2⁷ = 28247076749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28247076817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14123538438 + 14123538439.

It is an arithmetic number, because the mean of its divisors is an integer number (14123538439).

Almost surely, 2^28247076877 is an apocalyptic number.

It is an amenable number.

28247076877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28247076877 is an equidigital number, since it uses as much as digits as its factorization.

28247076877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14751744, while the sum is 58.

The spelling of 28247076877 in words is "twenty-eight billion, two hundred forty-seven million, seventy-six thousand, eight hundred seventy-seven".