68391560 has 16 divisors (see below), whose sum is σ = 153881100. Its totient is φ = 27356608.

The previous prime is 68391539. The next prime is 68391601. The reversal of 68391560 is 6519386.

It can be written as a sum of positive squares in 2 ways, for example, as 67141636 + 1249924 = 8194^2 + 1118^2 .

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, 854855 + ... + 854934.

Almost surely, 2^68391560 is an apocalyptic number.

It is an amenable number.

68391560 is an abundant number, since it is smaller than the sum of its proper divisors (85489540).

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

68391560 is a wasteful number, since it uses less digits than its factorization.

68391560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709800 (or 1709796 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 68391560 is about 8269.9189838837. The cubic root of 68391560 is about 408.9474489265.

The spelling of 68391560 in words is "sixty-eight million, three hundred ninety-one thousand, five hundred sixty".