82849578 has 64 divisors (see below), whose sum is σ = 197406720. Its totient is φ = 22680000.

The previous prime is 82849567. The next prime is 82849583. The reversal of 82849578 is 87594828.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 82849578.

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 31 ways as a sum of consecutive naturals, for example, 305583 + ... + 305853.

It is an arithmetic number, because the mean of its divisors is an integer number (3084480).

Almost surely, 2^82849578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82849578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98703360).

82849578 is an abundant number, since it is smaller than the sum of its proper divisors (114557142).

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

82849578 is a wasteful number, since it uses less digits than its factorization.

82849578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563.

The product of its digits is 1290240, while the sum is 51.

The square root of 82849578 is about 9102.1743556142. The cubic root of 82849578 is about 435.9433931784.

The spelling of 82849578 in words is "eighty-two million, eight hundred forty-nine thousand, five hundred seventy-eight".