68128672 has 24 divisors (see below), whose sum is σ = 134338176. Its totient is φ = 34011072.

The previous prime is 68128667. The next prime is 68128693. The reversal of 68128672 is 27682186.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26383 + ... + 28849.

It is an arithmetic number, because the mean of its divisors is an integer number (5597424).

Almost surely, 2^68128672 is an apocalyptic number.

It is an amenable number.

68128672 is a deficient number, since it is larger than the sum of its proper divisors (66209504).

68128672 is a wasteful number, since it uses less digits than its factorization.

68128672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340 (or 3332 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 68128672 is about 8254.0094499582. The cubic root of 68128672 is about 408.4227963727.

The spelling of 68128672 in words is "sixty-eight million, one hundred twenty-eight thousand, six hundred seventy-two".