68053840 has 20 divisors (see below), whose sum is σ = 158225364. Its totient is φ = 27221504.

The previous prime is 68053837. The next prime is 68053861. The reversal of 68053840 is 4835086.

It can be written as a sum of positive squares in 2 ways, for example, as 23270976 + 44782864 = 4824^2 + 6692^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 68053796 and 68053805.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 425257 + ... + 425416.

Almost surely, 2^68053840 is an apocalyptic number.

It is an amenable number.

68053840 is an abundant number, since it is smaller than the sum of its proper divisors (90171524).

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

68053840 is a wasteful number, since it uses less digits than its factorization.

68053840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850686 (or 850680 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 68053840 is about 8249.4751348192. The cubic root of 68053840 is about 408.2732054553.

The spelling of 68053840 in words is "sixty-eight million, fifty-three thousand, eight hundred forty".