67136728 has 32 divisors (see below), whose sum is σ = 134208000. Its totient is φ = 31393440.

The previous prime is 67136681. The next prime is 67136753. The reversal of 67136728 is 82763176.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9213 + ... + 14803.

It is an arithmetic number, because the mean of its divisors is an integer number (4194000).

Almost surely, 2^67136728 is an apocalyptic number.

It is an amenable number.

67136728 is a deficient number, since it is larger than the sum of its proper divisors (67071272).

67136728 is a wasteful number, since it uses less digits than its factorization.

67136728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5695 (or 5691 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 67136728 is about 8193.7005070969. The cubic root of 67136728 is about 406.4309045825.

The spelling of 67136728 in words is "sixty-seven million, one hundred thirty-six thousand, seven hundred twenty-eight".