84028187 has 4 divisors (see below), whose sum is σ = 84087240. Its totient is φ = 83969136.

The previous prime is 84028181. The next prime is 84028211. The reversal of 84028187 is 78182048.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84028187 - 2¹⁴ = 84011803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84028187.

It is not an unprimeable number, because it can be changed into a prime (84028181) by changing a digit.

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, 27338 + ... + 30255.

It is an arithmetic number, because the mean of its divisors is an integer number (21021810).

Almost surely, 2^84028187 is an apocalyptic number.

84028187 is a deficient number, since it is larger than the sum of its proper divisors (59053).

84028187 is a wasteful number, since it uses less digits than its factorization.

84028187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59052.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 84028187 is about 9166.6889878516. The cubic root of 84028187 is about 438.0008948224. Note that the first 3 decimals are identical.

The spelling of 84028187 in words is "eighty-four million, twenty-eight thousand, one hundred eighty-seven".