68818408 has 8 divisors (see below), whose sum is σ = 129034530. Its totient is φ = 34409200.

The previous prime is 68818381. The next prime is 68818411. The reversal of 68818408 is 80481886.

It can be written as a sum of positive squares in only one way, i.e., 60186564 + 8631844 = 7758^2 + 2938^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 4301143 + ... + 4301158.

Almost surely, 2^68818408 is an apocalyptic number.

It is an amenable number.

68818408 is a deficient number, since it is larger than the sum of its proper divisors (60216122).

68818408 is a wasteful number, since it uses less digits than its factorization.

68818408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8602307 (or 8602303 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 43.

The square root of 68818408 is about 8295.6861078515. The cubic root of 68818408 is about 409.7964645124.

The spelling of 68818408 in words is "sixty-eight million, eight hundred eighteen thousand, four hundred eight".