68940340 has 24 divisors (see below), whose sum is σ = 165457152. Its totient is φ = 23636640.

The previous prime is 68940307. The next prime is 68940353. The reversal of 68940340 is 4304986.

It is a junction number, because it is equal to n+sod(n) for n = 68940296 and 68940305.

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, 246076 + ... + 246355.

It is an arithmetic number, because the mean of its divisors is an integer number (6894048).

Almost surely, 2^68940340 is an apocalyptic number.

It is an amenable number.

68940340 is an abundant number, since it is smaller than the sum of its proper divisors (96516812).

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

68940340 is a wasteful number, since it uses less digits than its factorization.

68940340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492447 (or 492445 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 68940340 is about 8303.0319763325. The cubic root of 68940340 is about 410.0383466018.

The spelling of 68940340 in words is "sixty-eight million, nine hundred forty thousand, three hundred forty".