28402706477 has 2 divisors, whose sum is σ = 28402706478. Its totient is φ = 28402706476.

The previous prime is 28402706471. The next prime is 28402706533. The reversal of 28402706477 is 77460720482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25506006436 + 2896700041 = 159706^2 + 53821^2 .

It is a cyclic number.

It is not a de Polignac number, because 28402706477 - 2⁴ = 28402706461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28402706471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14201353238 + 14201353239.

It is an arithmetic number, because the mean of its divisors is an integer number (14201353239).

Almost surely, 2^28402706477 is an apocalyptic number.

It is an amenable number.

28402706477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28402706477 is an equidigital number, since it uses as much as digits as its factorization.

28402706477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1053696, while the sum is 47.

The spelling of 28402706477 in words is "twenty-eight billion, four hundred two million, seven hundred six thousand, four hundred seventy-seven".