82208389 has 12 divisors (see below), whose sum is σ = 84980556. Its totient is φ = 79521792.

The previous prime is 82208381. The next prime is 82208393. The reversal of 82208389 is 98380228.

It can be written as a sum of positive squares in 2 ways, for example, as 78464164 + 3744225 = 8858^2 + 1935^2 .

It is not a de Polignac number, because 82208389 - 2³ = 82208381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82208381) 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 11 ways as a sum of consecutive naturals, for example, 319749 + ... + 320005.

It is an arithmetic number, because the mean of its divisors is an integer number (7081713).

Almost surely, 2^82208389 is an apocalyptic number.

It is an amenable number.

82208389 is a deficient number, since it is larger than the sum of its proper divisors (2772167).

82208389 is a wasteful number, since it uses less digits than its factorization.

82208389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 82208389 is about 9066.8841946944. The cubic root of 82208389 is about 434.8158625237.

The spelling of 82208389 in words is "eighty-two million, two hundred eight thousand, three hundred eighty-nine".