84065878 has 8 divisors (see below), whose sum is σ = 135798768. Its totient is φ = 38799624.

The previous prime is 84065857. The next prime is 84065881. The reversal of 84065878 is 87856048.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1616626 + ... + 1616677.

It is an arithmetic number, because the mean of its divisors is an integer number (16974846).

Almost surely, 2^84065878 is an apocalyptic number.

84065878 is a deficient number, since it is larger than the sum of its proper divisors (51732890).

84065878 is a wasteful number, since it uses less digits than its factorization.

84065878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233318.

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 84065878 is about 9168.7446250836. The cubic root of 84065878 is about 438.0663737393.

The spelling of 84065878 in words is "eighty-four million, sixty-five thousand, eight hundred seventy-eight".