82170444 has 24 divisors (see below), whose sum is σ = 200067840. Its totient is φ = 26199184.

The previous prime is 82170443. The next prime is 82170449. The reversal of 82170444 is 44407128.

It is not an unprimeable number, because it can be changed into a prime (82170443) 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 7 ways as a sum of consecutive naturals, for example, 148584 + ... + 149135.

It is an arithmetic number, because the mean of its divisors is an integer number (8336160).

Almost surely, 2^82170444 is an apocalyptic number.

It is an amenable number.

82170444 is an abundant number, since it is smaller than the sum of its proper divisors (117897396).

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

82170444 is a wasteful number, since it uses less digits than its factorization.

82170444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297749 (or 297747 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 82170444 is about 9064.7914482353. The cubic root of 82170444 is about 434.7489527786.

The spelling of 82170444 in words is "eighty-two million, one hundred seventy thousand, four hundred forty-four".