68418688 has 32 divisors (see below), whose sum is σ = 146791260. Its totient is φ = 31577088.

The previous prime is 68418671. The next prime is 68418703. The reversal of 68418688 is 88681486.

It can be written as a sum of positive squares in 2 ways, for example, as 67765824 + 652864 = 8232^2 + 808^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×68418688² = 9362233735282688, which contains 22 as substring.

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, 18895 + ... + 22222.

Almost surely, 2^68418688 is an apocalyptic number.

It is an amenable number.

68418688 is an abundant number, since it is smaller than the sum of its proper divisors (78372572).

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

68418688 is a wasteful number, since it uses less digits than its factorization.

68418688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41144 (or 41132 counting only the distinct ones).

The product of its digits is 589824, while the sum is 49.

The square root of 68418688 is about 8271.5589824410. The cubic root of 68418688 is about 409.0015124196.

The spelling of 68418688 in words is "sixty-eight million, four hundred eighteen thousand, six hundred eighty-eight".