68315140 has 12 divisors (see below), whose sum is σ = 143461836. Its totient is φ = 27326048.

The previous prime is 68315123. The next prime is 68315179. The reversal of 68315140 is 4151386.

It can be written as a sum of positive squares in 2 ways, for example, as 28068804 + 40246336 = 5298^2 + 6344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68315099 and 68315108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1707859 + ... + 1707898.

It is an arithmetic number, because the mean of its divisors is an integer number (11955153).

Almost surely, 2^68315140 is an apocalyptic number.

It is an amenable number.

68315140 is an abundant number, since it is smaller than the sum of its proper divisors (75146696).

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

68315140 is a wasteful number, since it uses less digits than its factorization.

68315140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415766 (or 3415764 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 68315140 is about 8265.2973328248. The cubic root of 68315140 is about 408.7950743187.

The spelling of 68315140 in words is "sixty-eight million, three hundred fifteen thousand, one hundred forty".