82643320 has 16 divisors (see below), whose sum is σ = 185947560. Its totient is φ = 33057312.

The previous prime is 82643317. The next prime is 82643329. The reversal of 82643320 is 2334628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82643329) 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, 1033002 + ... + 1033081.

Almost surely, 2^82643320 is an apocalyptic number.

It is an amenable number.

82643320 is an abundant number, since it is smaller than the sum of its proper divisors (103304240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82643320 is a wasteful number, since it uses less digits than its factorization.

82643320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066094 (or 2066090 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 82643320 is about 9090.8371451699. The cubic root of 82643320 is about 435.5813252180.

Adding to 82643320 its reverse (2334628), we get a palindrome (84977948).

The spelling of 82643320 in words is "eighty-two million, six hundred forty-three thousand, three hundred twenty".