67728867 has 8 divisors (see below), whose sum is σ = 95617296. Its totient is φ = 42496512.

The previous prime is 67728853. The next prime is 67728877. The reversal of 67728867 is 76882776.

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

It is not a de Polignac number, because 67728867 - 2⁴ = 67728851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 1328017 = 67728867 / (6 + 7 + 7 + 2 + 8 + 8 + 6 + 7).

It is not an unprimeable number, because it can be changed into a prime (67728877) 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 7 ways as a sum of consecutive naturals, for example, 663958 + ... + 664059.

It is an arithmetic number, because the mean of its divisors is an integer number (11952162).

Almost surely, 2^67728867 is an apocalyptic number.

67728867 is a deficient number, since it is larger than the sum of its proper divisors (27888429).

67728867 is a wasteful number, since it uses less digits than its factorization.

67728867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328037.

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

The square root of 67728867 is about 8229.7549781266. The cubic root of 67728867 is about 407.6223016044.

The spelling of 67728867 in words is "sixty-seven million, seven hundred twenty-eight thousand, eight hundred sixty-seven".