68438505 has 8 divisors (see below), whose sum is σ = 109501632. Its totient is φ = 36500528.

The previous prime is 68438479. The next prime is 68438519. The reversal of 68438505 is 50583486.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68438505 - 2²⁰ = 67389929 is a prime.

It is a Curzon number.

It is an unprimeable number.

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, 2281269 + ... + 2281298.

It is an arithmetic number, because the mean of its divisors is an integer number (13687704).

Almost surely, 2^68438505 is an apocalyptic number.

It is an amenable number.

68438505 is a deficient number, since it is larger than the sum of its proper divisors (41063127).

68438505 is a wasteful number, since it uses less digits than its factorization.

68438505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4562575.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 68438505 is about 8272.7567956516. The cubic root of 68438505 is about 409.0409967613.

The spelling of 68438505 in words is "sixty-eight million, four hundred thirty-eight thousand, five hundred five".