68401844 has 18 divisors (see below), whose sum is σ = 139247010. Its totient is φ = 29314992.

The previous prime is 68401811. The next prime is 68401847. The reversal of 68401844 is 44810486.

It can be written as a sum of positive squares in only one way, i.e., 57577744 + 10824100 = 7588^2 + 3290^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68401847) 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 5 ways as a sum of consecutive naturals, for example, 174299 + ... + 174690.

It is an arithmetic number, because the mean of its divisors is an integer number (7735945).

Almost surely, 2^68401844 is an apocalyptic number.

It is an amenable number.

68401844 is an abundant number, since it is smaller than the sum of its proper divisors (70845166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68401844 is a wasteful number, since it uses less digits than its factorization.

68401844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349007 (or 348998 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 68401844 is about 8270.5407320199. The cubic root of 68401844 is about 408.9679456310.

The spelling of 68401844 in words is "sixty-eight million, four hundred one thousand, eight hundred forty-four".