84428185 has 4 divisors (see below), whose sum is σ = 101313828. Its totient is φ = 67542544.

The previous prime is 84428167. The next prime is 84428189. The reversal of 84428185 is 58182448.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16711744 + 67716441 = 4088^2 + 8229^2 .

It is a cyclic number.

It is not a de Polignac number, because 84428185 - 2¹¹ = 84426137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84428189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8442814 + ... + 8442823.

It is an arithmetic number, because the mean of its divisors is an integer number (25328457).

Almost surely, 2^84428185 is an apocalyptic number.

It is an amenable number.

84428185 is a deficient number, since it is larger than the sum of its proper divisors (16885643).

84428185 is a wasteful number, since it uses less digits than its factorization.

84428185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16885642.

The product of its digits is 81920, while the sum is 40.

The square root of 84428185 is about 9188.4811040781. The cubic root of 84428185 is about 438.6947977508.

The spelling of 84428185 in words is "eighty-four million, four hundred twenty-eight thousand, one hundred eighty-five".