68439850 has 12 divisors (see below), whose sum is σ = 127298214. Its totient is φ = 27375920.

The previous prime is 68439829. The next prime is 68439853. The reversal of 68439850 is 5893486.

It can be written as a sum of positive squares in 3 ways, for example, as 46826649 + 21613201 = 6843^2 + 4649^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68439797 and 68439806.

It is not an unprimeable number, because it can be changed into a prime (68439853) 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 5 ways as a sum of consecutive naturals, for example, 684349 + ... + 684448.

Almost surely, 2^68439850 is an apocalyptic number.

68439850 is a deficient number, since it is larger than the sum of its proper divisors (58858364).

68439850 is a wasteful number, since it uses less digits than its factorization.

68439850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368809 (or 1368804 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 68439850 is about 8272.8380861709. The cubic root of 68439850 is about 409.0436763276.

The spelling of 68439850 in words is "sixty-eight million, four hundred thirty-nine thousand, eight hundred fifty".