84871638 has 28 divisors (see below), whose sum is σ = 190877148. Its totient is φ = 28290060.

The previous prime is 84871621. The next prime is 84871639. The reversal of 84871638 is 83617848.

84871638 is a `hidden beast` number, since 8 + 4 + 8 + 7 + 1 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 84871593 and 84871602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84871639) by changing a digit.

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 13 ways as a sum of consecutive naturals, for example, 27648 + ... + 30563.

It is an arithmetic number, because the mean of its divisors is an integer number (6817041).

Almost surely, 2^84871638 is an apocalyptic number.

84871638 is an abundant number, since it is smaller than the sum of its proper divisors (106005510).

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

84871638 is an equidigital number, since it uses as much as digits as its factorization.

84871638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58231 (or 58216 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 84871638 is about 9212.5804202731. The cubic root of 84871638 is about 439.4615279257.

The spelling of 84871638 in words is "eighty-four million, eight hundred seventy-one thousand, six hundred thirty-eight".