68236406 has 16 divisors (see below), whose sum is σ = 118014624. Its totient is φ = 28984704.

The previous prime is 68236397. The next prime is 68236409. The reversal of 68236406 is 60463286.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68236409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19985 + ... + 23148.

It is an arithmetic number, because the mean of its divisors is an integer number (7375914).

Almost surely, 2^68236406 is an apocalyptic number.

68236406 is a deficient number, since it is larger than the sum of its proper divisors (49778218).

68236406 is a wasteful number, since it uses less digits than its factorization.

68236406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43255.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 68236406 is about 8260.5330336486. The cubic root of 68236406 is about 408.6379669081.

The spelling of 68236406 in words is "sixty-eight million, two hundred thirty-six thousand, four hundred six".