82841720 has 32 divisors (see below), whose sum is σ = 200733120. Its totient is φ = 30587520.

The previous prime is 82841711. The next prime is 82841743. The reversal of 82841720 is 2714828.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79136 + ... + 80175.

It is an arithmetic number, because the mean of its divisors is an integer number (6272910).

Almost surely, 2^82841720 is an apocalyptic number.

It is an amenable number.

82841720 is an abundant number, since it is smaller than the sum of its proper divisors (117891400).

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

82841720 is a wasteful number, since it uses less digits than its factorization.

82841720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159335 (or 159331 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 82841720 is about 9101.7426902764. The cubic root of 82841720 is about 435.9296101611.

The spelling of 82841720 in words is "eighty-two million, eight hundred forty-one thousand, seven hundred twenty".