68675840 has 36 divisors (see below), whose sum is σ = 164503164. Its totient is φ = 27469824.

The previous prime is 68675753. The next prime is 68675879. The reversal of 68675840 is 4857686.

It can be written as a sum of positive squares in 2 ways, for example, as 12845056 + 55830784 = 3584^2 + 7472^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68675791 and 68675800.

It is a congruent number.

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, 25547 + ... + 28106.

Almost surely, 2^68675840 is an apocalyptic number.

It is an amenable number.

68675840 is an abundant number, since it is smaller than the sum of its proper divisors (95827324).

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

68675840 is an equidigital number, since it uses as much as digits as its factorization.

68675840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53674 (or 53660 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 68675840 is about 8287.0887529940. The cubic root of 68675840 is about 409.5132832375.

The spelling of 68675840 in words is "sixty-eight million, six hundred seventy-five thousand, eight hundred forty".