68440056 has 32 divisors (see below), whose sum is σ = 171752400. Its totient is φ = 22726400.

The previous prime is 68440049. The next prime is 68440061. The reversal of 68440056 is 65004486.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 68439999 and 68440026.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156 + ... + 11756.

Almost surely, 2^68440056 is an apocalyptic number.

It is an amenable number.

68440056 is an abundant number, since it is smaller than the sum of its proper divisors (103312344).

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

68440056 is a wasteful number, since it uses less digits than its factorization.

68440056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10879 (or 10875 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 68440056 is about 8272.8505365442. The cubic root of 68440056 is about 409.0440867265.

The spelling of 68440056 in words is "sixty-eight million, four hundred forty thousand, fifty-six".