84328820 has 12 divisors (see below), whose sum is σ = 177090564. Its totient is φ = 33731520.

The previous prime is 84328801. The next prime is 84328861. The reversal of 84328820 is 2882348.

It can be written as a sum of positive squares in 2 ways, for example, as 44462224 + 39866596 = 6668^2 + 6314^2 .

It is a super-2 number, since 2×84328820² = 14222699765184800, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 2108201 + ... + 2108240.

It is an arithmetic number, because the mean of its divisors is an integer number (14757547).

Almost surely, 2^84328820 is an apocalyptic number.

It is an amenable number.

84328820 is an abundant number, since it is smaller than the sum of its proper divisors (92761744).

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

84328820 is a wasteful number, since it uses less digits than its factorization.

84328820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4216450 (or 4216448 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 84328820 is about 9183.0724705841. The cubic root of 84328820 is about 438.5226276761.

The spelling of 84328820 in words is "eighty-four million, three hundred twenty-eight thousand, eight hundred twenty".