68217344 has 80 divisors (see below), whose sum is σ = 151297608. Its totient is φ = 30523392.

The previous prime is 68217341. The next prime is 68217349. The reversal of 68217344 is 44371286.

It can be written as a sum of positive squares in 4 ways, for example, as 50239744 + 17977600 = 7088^2 + 4240^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68217341) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 246134 + ... + 246410.

Almost surely, 2^68217344 is an apocalyptic number.

68217344 is a gapful number since it is divisible by the number (64) 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 68217344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75648804).

68217344 is an abundant number, since it is smaller than the sum of its proper divisors (83080264).

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

68217344 is a wasteful number, since it uses less digits than its factorization.

68217344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 329 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 68217344 is about 8259.3791534231. The cubic root of 68217344 is about 408.5999120396.

The spelling of 68217344 in words is "sixty-eight million, two hundred seventeen thousand, three hundred forty-four".