68344240 has 20 divisors (see below), whose sum is σ = 158900544. Its totient is φ = 27337664.

The previous prime is 68344229. The next prime is 68344307. The reversal of 68344240 is 4244386.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 427072 + ... + 427231.

Almost surely, 2^68344240 is an apocalyptic number.

It is an amenable number.

68344240 is an abundant number, since it is smaller than the sum of its proper divisors (90556304).

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

68344240 is a wasteful number, since it uses less digits than its factorization.

68344240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854316 (or 854310 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 68344240 is about 8267.0575176419. The cubic root of 68344240 is about 408.8531104923.

The spelling of 68344240 in words is "sixty-eight million, three hundred forty-four thousand, two hundred forty".