68544040 has 16 divisors (see below), whose sum is σ = 154224180. Its totient is φ = 27417600.

The previous prime is 68544037. The next prime is 68544067. The reversal of 68544040 is 4044586.

It can be written as a sum of positive squares in 2 ways, for example, as 67338436 + 1205604 = 8206^2 + 1098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68543993 and 68544011.

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, 856761 + ... + 856840.

Almost surely, 2^68544040 is an apocalyptic number.

It is an amenable number.

68544040 is an abundant number, since it is smaller than the sum of its proper divisors (85680140).

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

68544040 is a wasteful number, since it uses less digits than its factorization.

68544040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713612 (or 1713608 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 68544040 is about 8279.1328048293. The cubic root of 68544040 is about 409.2511414820.

The spelling of 68544040 in words is "sixty-eight million, five hundred forty-four thousand, forty".