67112728 has 32 divisors (see below), whose sum is σ = 130669200. Its totient is φ = 32276608.

The previous prime is 67112659. The next prime is 67112743. The reversal of 67112728 is 82721176.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 67112693 and 67112702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102450 + ... + 103102.

Almost surely, 2^67112728 is an apocalyptic number.

It is an amenable number.

67112728 is a deficient number, since it is larger than the sum of its proper divisors (63556472).

67112728 is a wasteful number, since it uses less digits than its factorization.

67112728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1127 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 67112728 is about 8192.2358364490. The cubic root of 67112728 is about 406.3824685795.

The spelling of 67112728 in words is "sixty-seven million, one hundred twelve thousand, seven hundred twenty-eight".