82719018 has 24 divisors (see below), whose sum is σ = 179396100. Its totient is φ = 27546624.

The previous prime is 82719011. The next prime is 82719019. The reversal of 82719018 is 81091728.

It can be written as a sum of positive squares in 2 ways, for example, as 66048129 + 16670889 = 8127^2 + 4083^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82719011) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 29418 + ... + 32106.

Almost surely, 2^82719018 is an apocalyptic number.

82719018 is an abundant number, since it is smaller than the sum of its proper divisors (96677082).

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

82719018 is a wasteful number, since it uses less digits than its factorization.

82719018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4406 (or 4403 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 82719018 is about 9094.9996151732. Note that the first 3 decimals coincide. The cubic root of 82719018 is about 435.7142763671.

The spelling of 82719018 in words is "eighty-two million, seven hundred nineteen thousand, eighteen".