82991444 has 12 divisors (see below), whose sum is σ = 149160564. Its totient is φ = 40374144.

The previous prime is 82991443. The next prime is 82991453. The reversal of 82991444 is 44419928.

It can be written as a sum of positive squares in 2 ways, for example, as 28408900 + 54582544 = 5330^2 + 7388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82991443) 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 3 ways as a sum of consecutive naturals, for example, 280229 + ... + 280524.

It is an arithmetic number, because the mean of its divisors is an integer number (12430047).

Almost surely, 2^82991444 is an apocalyptic number.

It is an amenable number.

82991444 is a deficient number, since it is larger than the sum of its proper divisors (66169120).

82991444 is a wasteful number, since it uses less digits than its factorization.

82991444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560794 (or 560792 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 82991444 is about 9109.9639955381. The cubic root of 82991444 is about 436.1920779249.

The spelling of 82991444 in words is "eighty-two million, nine hundred ninety-one thousand, four hundred forty-four".