67728764 has 12 divisors (see below), whose sum is σ = 118818000. Its totient is φ = 33780768.

The previous prime is 67728691. The next prime is 67728779. The reversal of 67728764 is 46782776.

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, 19064 + ... + 22335.

It is an arithmetic number, because the mean of its divisors is an integer number (9901500).

Almost surely, 2^67728764 is an apocalyptic number.

It is an amenable number.

67728764 is a deficient number, since it is larger than the sum of its proper divisors (51089236).

67728764 is a wasteful number, since it uses less digits than its factorization.

67728764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41812 (or 41810 counting only the distinct ones).

The product of its digits is 790272, while the sum is 47.

The square root of 67728764 is about 8229.7487203438. The cubic root of 67728764 is about 407.6220949711.

The spelling of 67728764 in words is "sixty-seven million, seven hundred twenty-eight thousand, seven hundred sixty-four".