82464820 has 24 divisors (see below), whose sum is σ = 176445864. Its totient is φ = 32363136.

The previous prime is 82464803. The next prime is 82464869. The reversal of 82464820 is 2846428.

It can be written as a sum of positive squares in 4 ways, for example, as 25522704 + 56942116 = 5052^2 + 7546^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37839 + ... + 39958.

It is an arithmetic number, because the mean of its divisors is an integer number (7351911).

Almost surely, 2^82464820 is an apocalyptic number.

It is an amenable number.

82464820 is an abundant number, since it is smaller than the sum of its proper divisors (93981044).

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

82464820 is a wasteful number, since it uses less digits than its factorization.

82464820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77859 (or 77857 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 82464820 is about 9081.0142605328. The cubic root of 82464820 is about 435.2674974268.

The spelling of 82464820 in words is "eighty-two million, four hundred sixty-four thousand, eight hundred twenty".