68024840 has 32 divisors (see below), whose sum is σ = 164830680. Its totient is φ = 25116672.

The previous prime is 68024797. The next prime is 68024849. The reversal of 68024840 is 4842086.

It can be written as a sum of positive squares in 4 ways, for example, as 58277956 + 9746884 = 7634^2 + 3122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68024797 and 68024806.

It is not an unprimeable number, because it can be changed into a prime (68024849) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 64889 + ... + 65928.

Almost surely, 2^68024840 is an apocalyptic number.

It is an amenable number.

68024840 is an abundant number, since it is smaller than the sum of its proper divisors (96805840).

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

68024840 is a wasteful number, since it uses less digits than its factorization.

68024840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130841 (or 130837 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 68024840 is about 8247.7172599453. The cubic root of 68024840 is about 408.2152042945.

The spelling of 68024840 in words is "sixty-eight million, twenty-four thousand, eight hundred forty".