68138808 has 16 divisors (see below), whose sum is σ = 170347080. Its totient is φ = 22712928.

The previous prime is 68138803. The next prime is 68138809. The reversal of 68138808 is 80883186.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 68138808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68138803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1419535 + ... + 1419582.

Almost surely, 2^68138808 is an apocalyptic number.

It is an amenable number.

68138808 is an abundant number, since it is smaller than the sum of its proper divisors (102208272).

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

68138808 is a wasteful number, since it uses less digits than its factorization.

68138808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839126 (or 2839122 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 68138808 is about 8254.6234317502. The cubic root of 68138808 is about 408.4430500488.

The spelling of 68138808 in words is "sixty-eight million, one hundred thirty-eight thousand, eight hundred eight".