68885305 has 8 divisors (see below), whose sum is σ = 84896712. Its totient is φ = 53618688.

The previous prime is 68885303. The next prime is 68885321. The reversal of 68885305 is 50358886.

It can be written as a sum of positive squares in 4 ways, for example, as 19927296 + 48958009 = 4464^2 + 6997^2 .

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 68885305 - 2¹ = 68885303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68885303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185992 + ... + 186361.

It is an arithmetic number, because the mean of its divisors is an integer number (10612089).

Almost surely, 2^68885305 is an apocalyptic number.

It is an amenable number.

68885305 is a deficient number, since it is larger than the sum of its proper divisors (16011407).

68885305 is a wasteful number, since it uses less digits than its factorization.

68885305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372395.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 68885305 is about 8299.7171638556. The cubic root of 68885305 is about 409.9292064960.

The spelling of 68885305 in words is "sixty-eight million, eight hundred eighty-five thousand, three hundred five".