28777342447 has 6 divisors (see below), whose sum is σ = 33475684128. Its totient is φ = 24666293484.

The previous prime is 28777342421. The next prime is 28777342459. The reversal of 28777342447 is 74424377782.

It is a de Polignac number, because none of the positive numbers 2^k-28777342447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28777342417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293646303 + ... + 293646400.

It is an arithmetic number, because the mean of its divisors is an integer number (5579280688).

Almost surely, 2^28777342447 is an apocalyptic number.

28777342447 is a deficient number, since it is larger than the sum of its proper divisors (4698341681).

28777342447 is an equidigital number, since it uses as much as digits as its factorization.

28777342447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587292717 (or 587292710 counting only the distinct ones).

The product of its digits is 14751744, while the sum is 55.

The spelling of 28777342447 in words is "twenty-eight billion, seven hundred seventy-seven million, three hundred forty-two thousand, four hundred forty-seven".