68073638 has 4 divisors (see below), whose sum is σ = 102110460. Its totient is φ = 34036818.

The previous prime is 68073631. The next prime is 68073641. The reversal of 68073638 is 83637086.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 68073595 and 68073604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68073631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17018408 + ... + 17018411.

It is an arithmetic number, because the mean of its divisors is an integer number (25527615).

Almost surely, 2^68073638 is an apocalyptic number.

68073638 is a deficient number, since it is larger than the sum of its proper divisors (34036822).

68073638 is a wasteful number, since it uses less digits than its factorization.

68073638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34036821.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 68073638 is about 8250.6750026892. The cubic root of 68073638 is about 408.3127927841.

The spelling of 68073638 in words is "sixty-eight million, seventy-three thousand, six hundred thirty-eight".