28807915779 has 6 divisors (see below), whose sum is σ = 41611433916. Its totient is φ = 19205277180.

The previous prime is 28807915769. The next prime is 28807915837. The reversal of 28807915779 is 97751970882.

It is not a de Polignac number, because 28807915779 - 2¹⁶ = 28807850243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28807915739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1600439757 + ... + 1600439774.

It is an arithmetic number, because the mean of its divisors is an integer number (6935238986).

Almost surely, 2^28807915779 is an apocalyptic number.

28807915779 is a deficient number, since it is larger than the sum of its proper divisors (12803518137).

28807915779 is a wasteful number, since it uses less digits than its factorization.

28807915779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200879537 (or 3200879534 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 63.

The spelling of 28807915779 in words is "twenty-eight billion, eight hundred seven million, nine hundred fifteen thousand, seven hundred seventy-nine".