68393638 has 16 divisors (see below), whose sum is σ = 105242976. Its totient is φ = 33321600.

The previous prime is 68393623. The next prime is 68393639. The reversal of 68393638 is 83639386.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68393639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13870 + ... + 18142.

It is an arithmetic number, because the mean of its divisors is an integer number (6577686).

Almost surely, 2^68393638 is an apocalyptic number.

68393638 is a deficient number, since it is larger than the sum of its proper divisors (36849338).

68393638 is a wasteful number, since it uses less digits than its factorization.

68393638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4479.

The product of its digits is 559872, while the sum is 46.

The square root of 68393638 is about 8270.0446189848. The cubic root of 68393638 is about 408.9515906861.

The spelling of 68393638 in words is "sixty-eight million, three hundred ninety-three thousand, six hundred thirty-eight".