68944240 has 20 divisors (see below), whose sum is σ = 160295544. Its totient is φ = 27577664.

The previous prime is 68944229. The next prime is 68944259. The reversal of 68944240 is 4244986.

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

It is a self number, because there is not a number n which added to its sum of digits gives 68944240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430822 + ... + 430981.

Almost surely, 2^68944240 is an apocalyptic number.

It is an amenable number.

68944240 is an abundant number, since it is smaller than the sum of its proper divisors (91351304).

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

68944240 is a wasteful number, since it uses less digits than its factorization.

68944240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861816 (or 861810 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 68944240 is about 8303.2668269784. The cubic root of 68944240 is about 410.0460785015.

The spelling of 68944240 in words is "sixty-eight million, nine hundred forty-four thousand, two hundred forty".