68635138 has 32 divisors (see below), whose sum is σ = 123786432. Its totient is φ = 28123200.

The previous prime is 68635129. The next prime is 68635153. The reversal of 68635138 is 83153686.

It is a self number, because there is not a number n which added to its sum of digits gives 68635138.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9508 + ... + 15088.

It is an arithmetic number, because the mean of its divisors is an integer number (3868326).

Almost surely, 2^68635138 is an apocalyptic number.

68635138 is a deficient number, since it is larger than the sum of its proper divisors (55151294).

68635138 is a wasteful number, since it uses less digits than its factorization.

68635138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650.

The product of its digits is 103680, while the sum is 40.

The square root of 68635138 is about 8284.6326412219. The cubic root of 68635138 is about 409.4323653892.

The spelling of 68635138 in words is "sixty-eight million, six hundred thirty-five thousand, one hundred thirty-eight".