68418756 has 120 divisors (see below), whose sum is σ = 207182976. Its totient is φ = 19284480.

The previous prime is 68418703. The next prime is 68418773. The reversal of 68418756 is 65781486.

It is a happy number.

It is a super-2 number, since 2×68418756² = 9362252345175072, which contains 22 as substring.

Its product of digits (322560) is a multiple of the sum of its prime divisors (420).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 219841 + ... + 220151.

Almost surely, 2^68418756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68418756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103591488).

68418756 is an abundant number, since it is smaller than the sum of its proper divisors (138764220).

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

68418756 is a wasteful number, since it uses less digits than its factorization.

68418756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 420 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 68418756 is about 8271.5630929106. The cubic root of 68418756 is about 409.0016479191.

The spelling of 68418756 in words is "sixty-eight million, four hundred eighteen thousand, seven hundred fifty-six".