82170044 has 48 divisors (see below), whose sum is σ = 170644320. Its totient is φ = 34191360.

The previous prime is 82170043. The next prime is 82170047. The reversal of 82170044 is 44007128.

It is a super-2 number, since 2×82170044² = 13503832261923872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82169995 and 82170022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82170043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26192 + ... + 29160.

It is an arithmetic number, because the mean of its divisors is an integer number (3555090).

Almost surely, 2^82170044 is an apocalyptic number.

It is an amenable number.

82170044 is an abundant number, since it is smaller than the sum of its proper divisors (88474276).

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

82170044 is a wasteful number, since it uses less digits than its factorization.

82170044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038 (or 3036 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 82170044 is about 9064.7693848217. The cubic root of 82170044 is about 434.7482473349.

The spelling of 82170044 in words is "eighty-two million, one hundred seventy thousand, forty-four".