68143844 has 12 divisors (see below), whose sum is σ = 119311164. Its totient is φ = 34054944.

The previous prime is 68143813. The next prime is 68143897. The reversal of 68143844 is 44834186.

It can be written as a sum of positive squares in 2 ways, for example, as 64609444 + 3534400 = 8038^2 + 1880^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68143798 and 68143807.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10394 + ... + 15630.

It is an arithmetic number, because the mean of its divisors is an integer number (9942597).

Almost surely, 2^68143844 is an apocalyptic number.

It is an amenable number.

68143844 is a deficient number, since it is larger than the sum of its proper divisors (51167320).

68143844 is a wasteful number, since it uses less digits than its factorization.

68143844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8494 (or 8492 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 68143844 is about 8254.9284672855. The cubic root of 68143844 is about 408.4531121979.

The spelling of 68143844 in words is "sixty-eight million, one hundred forty-three thousand, eight hundred forty-four".