82304391 has 16 divisors (see below), whose sum is σ = 121376864. Its totient is φ = 49279104.

The previous prime is 82304363. The next prime is 82304393. The reversal of 82304391 is 19340328.

It is not a de Polignac number, because 82304391 - 2¹⁹ = 81780103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82304393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27076 + ... + 29961.

It is an arithmetic number, because the mean of its divisors is an integer number (7586054).

Almost surely, 2^82304391 is an apocalyptic number.

82304391 is a deficient number, since it is larger than the sum of its proper divisors (39072473).

82304391 is a wasteful number, since it uses less digits than its factorization.

82304391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57090.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 82304391 is about 9072.1767509237. The cubic root of 82304391 is about 434.9850543154.

It can be divided in two parts, 8230 and 4391, that added together give a palindrome (12621).

The spelling of 82304391 in words is "eighty-two million, three hundred four thousand, three hundred ninety-one".