82642840 has 32 divisors (see below), whose sum is σ = 212510880. Its totient is φ = 28334592.

The previous prime is 82642829. The next prime is 82642853. The reversal of 82642840 is 4824628.

It is a junction number, because it is equal to n+sod(n) for n = 82642796 and 82642805.

It is a congruent number.

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, 147297 + ... + 147856.

It is an arithmetic number, because the mean of its divisors is an integer number (6640965).

Almost surely, 2^82642840 is an apocalyptic number.

It is an amenable number.

82642840 is an abundant number, since it is smaller than the sum of its proper divisors (129868040).

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

82642840 is a wasteful number, since it uses less digits than its factorization.

82642840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295171 (or 295167 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 82642840 is about 9090.8107449226. The cubic root of 82642840 is about 435.5804819176.

The spelling of 82642840 in words is "eighty-two million, six hundred forty-two thousand, eight hundred forty".