68510720 has 44 divisors (see below), whose sum is σ = 164357724. Its totient is φ = 27402240.

The previous prime is 68510707. The next prime is 68510723. The reversal of 68510720 is 2701586.

It can be written as a sum of positive squares in 2 ways, for example, as 15745024 + 52765696 = 3968^2 + 7264^2 .

It is not an unprimeable number, because it can be changed into a prime (68510723) by changing a digit.

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, 1571 + ... + 11810.

Almost surely, 2^68510720 is an apocalyptic number.

It is an amenable number.

68510720 is an abundant number, since it is smaller than the sum of its proper divisors (95847004).

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

68510720 is a wasteful number, since it uses less digits than its factorization.

68510720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13406 (or 13388 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 68510720 is about 8277.1202721720. The cubic root of 68510720 is about 409.1848169302.

The spelling of 68510720 in words is "sixty-eight million, five hundred ten thousand, seven hundred twenty".