82775138 has 16 divisors (see below), whose sum is σ = 126337536. Its totient is φ = 40667040.

The previous prime is 82775123. The next prime is 82775167. The reversal of 82775138 is 83157728.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 82775095 and 82775104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44495 + ... + 46317.

It is an arithmetic number, because the mean of its divisors is an integer number (7896096).

Almost surely, 2^82775138 is an apocalyptic number.

82775138 is a deficient number, since it is larger than the sum of its proper divisors (43562398).

82775138 is a wasteful number, since it uses less digits than its factorization.

82775138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209.

The product of its digits is 94080, while the sum is 41.

The square root of 82775138 is about 9098.0843038521. The cubic root of 82775138 is about 435.8127896153.

The spelling of 82775138 in words is "eighty-two million, seven hundred seventy-five thousand, one hundred thirty-eight".