28807040477 has 2 divisors, whose sum is σ = 28807040478. Its totient is φ = 28807040476.

The previous prime is 28807040453. The next prime is 28807040497. The reversal of 28807040477 is 77404070882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27062224036 + 1744816441 = 164506^2 + 41771^2 .

It is a cyclic number.

It is not a de Polignac number, because 28807040477 - 2¹² = 28807036381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28807040417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403520238 + 14403520239.

It is an arithmetic number, because the mean of its divisors is an integer number (14403520239).

Almost surely, 2^28807040477 is an apocalyptic number.

It is an amenable number.

28807040477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28807040477 is an equidigital number, since it uses as much as digits as its factorization.

28807040477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 702464, while the sum is 47.

The spelling of 28807040477 in words is "twenty-eight billion, eight hundred seven million, forty thousand, four hundred seventy-seven".