28777723336 has 32 divisors (see below), whose sum is σ = 56749766400. Its totient is φ = 13661968320.

The previous prime is 28777723319. The next prime is 28777723339. The reversal of 28777723336 is 63332777782.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28777723339) 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 7 ways as a sum of consecutive naturals, for example, 1081566 + ... + 1107853.

It is an arithmetic number, because the mean of its divisors is an integer number (1773430200).

Almost surely, 2^28777723336 is an apocalyptic number.

It is an amenable number.

28777723336 is a deficient number, since it is larger than the sum of its proper divisors (27972043064).

28777723336 is a wasteful number, since it uses less digits than its factorization.

28777723336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189509 (or 2189505 counting only the distinct ones).

The product of its digits is 12446784, while the sum is 55.

It can be divided in two parts, 287777 and 23336, that added together give a palindrome (311113).

The spelling of 28777723336 in words is "twenty-eight billion, seven hundred seventy-seven million, seven hundred twenty-three thousand, three hundred thirty-six".