82109444 has 12 divisors (see below), whose sum is σ = 144252444. Its totient is φ = 40894464.

The previous prime is 82109413. The next prime is 82109449. The reversal of 82109444 is 44490128.

It can be written as a sum of positive squares in 2 ways, for example, as 48469444 + 33640000 = 6962^2 + 5800^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 82109444.

It is not an unprimeable number, because it can be changed into a prime (82109449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38909 + ... + 40964.

It is an arithmetic number, because the mean of its divisors is an integer number (12021037).

Almost surely, 2^82109444 is an apocalyptic number.

It is an amenable number.

82109444 is a deficient number, since it is larger than the sum of its proper divisors (62143000).

82109444 is a wasteful number, since it uses less digits than its factorization.

82109444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80134 (or 80132 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 82109444 is about 9061.4261570682. The cubic root of 82109444 is about 434.6413461587.

The spelling of 82109444 in words is "eighty-two million, one hundred nine thousand, four hundred forty-four".