84128205 has 32 divisors (see below), whose sum is σ = 154222848. Its totient is φ = 38361600.

The previous prime is 84128173. The next prime is 84128249. The reversal of 84128205 is 50282148.

It is not a de Polignac number, because 84128205 - 2⁵ = 84128173 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 56065 + ... + 57545.

It is an arithmetic number, because the mean of its divisors is an integer number (4819464).

Almost surely, 2^84128205 is an apocalyptic number.

It is an amenable number.

84128205 is a deficient number, since it is larger than the sum of its proper divisors (70094643).

84128205 is a wasteful number, since it uses less digits than its factorization.

84128205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 84128205 is about 9172.1428793930. The cubic root of 84128205 is about 438.1746087675.

The spelling of 84128205 in words is "eighty-four million, one hundred twenty-eight thousand, two hundred five".