84728079 has 16 divisors (see below), whose sum is σ = 127893600. Its totient is φ = 55418688.

The previous prime is 84728041. The next prime is 84728081. The reversal of 84728079 is 97082748.

It is a de Polignac number, because none of the positive numbers 2^k-84728079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84728029) 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 15 ways as a sum of consecutive naturals, for example, 28174 + ... + 31035.

It is an arithmetic number, because the mean of its divisors is an integer number (7993350).

Almost surely, 2^84728079 is an apocalyptic number.

84728079 is a deficient number, since it is larger than the sum of its proper divisors (43165521).

84728079 is a wasteful number, since it uses less digits than its factorization.

84728079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59271 (or 59265 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 84728079 is about 9204.7856574719. The cubic root of 84728079 is about 439.2136074049.

The spelling of 84728079 in words is "eighty-four million, seven hundred twenty-eight thousand, seventy-nine".