68021438 has 8 divisors (see below), whose sum is σ = 102643632. Its totient is φ = 33806896.

The previous prime is 68021417. The next prime is 68021441. The reversal of 68021438 is 83412086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

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, 101495 + ... + 102162.

It is an arithmetic number, because the mean of its divisors is an integer number (12830454).

Almost surely, 2^68021438 is an apocalyptic number.

68021438 is a deficient number, since it is larger than the sum of its proper divisors (34622194).

68021438 is a wasteful number, since it uses less digits than its factorization.

68021438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203826.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 68021438 is about 8247.5110184831. The cubic root of 68021438 is about 408.2083990781.

The spelling of 68021438 in words is "sixty-eight million, twenty-one thousand, four hundred thirty-eight".