82840144 has 10 divisors (see below), whose sum is σ = 160502810. Its totient is φ = 41420064.

The previous prime is 82840139. The next prime is 82840157. The reversal of 82840144 is 44104828.

It can be written as a sum of positive squares in only one way, i.e., 43401744 + 39438400 = 6588^2 + 6280^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2588739 + ... + 2588770.

It is an arithmetic number, because the mean of its divisors is an integer number (16050281).

Almost surely, 2^82840144 is an apocalyptic number.

It is an amenable number.

82840144 is a deficient number, since it is larger than the sum of its proper divisors (77662666).

82840144 is a wasteful number, since it uses less digits than its factorization.

82840144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177517 (or 5177511 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 82840144 is about 9101.6561130379. The cubic root of 82840144 is about 435.9268457351.

The spelling of 82840144 in words is "eighty-two million, eight hundred forty thousand, one hundred forty-four".