28868803477 has 2 divisors, whose sum is σ = 28868803478. Its totient is φ = 28868803476.

The previous prime is 28868803463. The next prime is 28868803493. The reversal of 28868803477 is 77430886882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25899752356 + 2969051121 = 160934^2 + 54489^2 .

It is a cyclic number.

It is not a de Polignac number, because 28868803477 - 2¹⁵ = 28868770709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28868803417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14434401738 + 14434401739.

It is an arithmetic number, because the mean of its divisors is an integer number (14434401739).

Almost surely, 2^28868803477 is an apocalyptic number.

It is an amenable number.

28868803477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28868803477 is an equidigital number, since it uses as much as digits as its factorization.

28868803477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28901376, while the sum is 61.

The spelling of 28868803477 in words is "twenty-eight billion, eight hundred sixty-eight million, eight hundred three thousand, four hundred seventy-seven".