84686728 has 32 divisors (see below), whose sum is σ = 187732800. Its totient is φ = 35042112.

The previous prime is 84686717. The next prime is 84686731. The reversal of 84686728 is 82768648.

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 7 ways as a sum of consecutive naturals, for example, 24450 + ... + 27697.

It is an arithmetic number, because the mean of its divisors is an integer number (5866650).

Almost surely, 2^84686728 is an apocalyptic number.

It is an amenable number.

84686728 is an abundant number, since it is smaller than the sum of its proper divisors (103046072).

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

84686728 is a wasteful number, since it uses less digits than its factorization.

84686728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52189 (or 52185 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 84686728 is about 9202.5392148037. The cubic root of 84686728 is about 439.1421439754.

The spelling of 84686728 in words is "eighty-four million, six hundred eighty-six thousand, seven hundred twenty-eight".