28773844837782 has 64 divisors (see below), whose sum is σ = 64305039262464. Its totient is φ = 8507853527040.

The previous prime is 28773844837769. The next prime is 28773844837883.

28773844837782 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 28773844837698 and 28773844837707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2416003 + ... + 7961454.

It is an arithmetic number, because the mean of its divisors is an integer number (1004766238476).

Almost surely, 2^{28773844837782} is an apocalyptic number.

28773844837782 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28773844837782 is an abundant number, since it is smaller than the sum of its proper divisors (35531194424682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28773844837782 is a wasteful number, since it uses less digits than its factorization.

28773844837782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378493.

The product of its digits is 5664669696, while the sum is 78.

The spelling of 28773844837782 in words is "twenty-eight trillion, seven hundred seventy-three billion, eight hundred forty-four million, eight hundred thirty-seven thousand, seven hundred eighty-two".