67728687 has 16 divisors (see below), whose sum is σ = 97843200. Its totient is φ = 41425632.

The previous prime is 67728667. The next prime is 67728691. The reversal of 67728687 is 78682776.

It is not a de Polignac number, because 67728687 - 2⁶ = 67728623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67728667) 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, 1314 + ... + 11712.

It is an arithmetic number, because the mean of its divisors is an integer number (6115200).

Almost surely, 2^67728687 is an apocalyptic number.

67728687 is a deficient number, since it is larger than the sum of its proper divisors (30114513).

67728687 is a wasteful number, since it uses less digits than its factorization.

67728687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10582.

The product of its digits is 1580544, while the sum is 51.

The square root of 67728687 is about 8229.7440421923. The cubic root of 67728687 is about 407.6219404976.

The spelling of 67728687 in words is "sixty-seven million, seven hundred twenty-eight thousand, six hundred eighty-seven".