82170774 has 40 divisors (see below), whose sum is σ = 210429648. Its totient is φ = 23477040.

The previous prime is 82170773. The next prime is 82170779. The reversal of 82170774 is 47707128.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82170773) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35097 + ... + 37364.

Almost surely, 2^82170774 is an apocalyptic number.

82170774 is an abundant number, since it is smaller than the sum of its proper divisors (128258874).

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

82170774 is a wasteful number, since it uses less digits than its factorization.

82170774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72482 (or 72473 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 82170774 is about 9064.8096505111. The cubic root of 82170774 is about 434.7495347679.

It can be divided in two parts, 82170 and 774, that added together give a square (82944 = 288²).

The spelling of 82170774 in words is "eighty-two million, one hundred seventy thousand, seven hundred seventy-four".