82771818 has 16 divisors (see below), whose sum is σ = 169394016. Its totient is φ = 26948880.

The previous prime is 82771817. The next prime is 82771831. The reversal of 82771818 is 81817728.

It is a self number, because there is not a number n which added to its sum of digits gives 82771818.

It is not an unprimeable number, because it can be changed into a prime (82771817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160153 + ... + 160668.

It is an arithmetic number, because the mean of its divisors is an integer number (10587126).

Almost surely, 2^82771818 is an apocalyptic number.

82771818 is an abundant number, since it is smaller than the sum of its proper divisors (86622198).

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

82771818 is a wasteful number, since it uses less digits than its factorization.

82771818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320869.

The product of its digits is 50176, while the sum is 42.

The square root of 82771818 is about 9097.9018460302. The cubic root of 82771818 is about 435.8069629148.

The spelling of 82771818 in words is "eighty-two million, seven hundred seventy-one thousand, eight hundred eighteen".