68340340 has 96 divisors (see below), whose sum is σ = 163296000. Its totient is φ = 23869440.

The previous prime is 68340329. The next prime is 68340343. The reversal of 68340340 is 4304386.

It is a junction number, because it is equal to n+sod(n) for n = 68340299 and 68340308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68340343) 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 31 ways as a sum of consecutive naturals, for example, 458586 + ... + 458734.

It is an arithmetic number, because the mean of its divisors is an integer number (1701000).

Almost surely, 2^68340340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68340340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81648000).

68340340 is an abundant number, since it is smaller than the sum of its proper divisors (94955660).

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

68340340 is a wasteful number, since it uses less digits than its factorization.

68340340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 68340340 is about 8266.8216383324. The cubic root of 68340340 is about 408.8453334045.

The spelling of 68340340 in words is "sixty-eight million, three hundred forty thousand, three hundred forty".