68223840 has 96 divisors (see below), whose sum is σ = 217455840. Its totient is φ = 17977344.

The previous prime is 68223833. The next prime is 68223899. The reversal of 68223840 is 4832286.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41922 + ... + 43518.

It is an arithmetic number, because the mean of its divisors is an integer number (2265165).

Almost surely, 2^68223840 is an apocalyptic number.

68223840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68223840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108727920).

68223840 is an abundant number, since it is smaller than the sum of its proper divisors (149232000).

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

68223840 is a wasteful number, since it uses less digits than its factorization.

68223840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 68223840 is about 8259.7723939586. The cubic root of 68223840 is about 408.6128812770.

The spelling of 68223840 in words is "sixty-eight million, two hundred twenty-three thousand, eight hundred forty".