68909868 has 18 divisors (see below), whose sum is σ = 174188924. Its totient is φ = 22969944.

The previous prime is 68909851. The next prime is 68909921. The reversal of 68909868 is 86890986.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 957046 + ... + 957117.

Almost surely, 2^68909868 is an apocalyptic number.

It is an amenable number.

68909868 is an abundant number, since it is smaller than the sum of its proper divisors (105279056).

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

68909868 is a wasteful number, since it uses less digits than its factorization.

68909868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914173 (or 1914168 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 68909868 is about 8301.1967811876. The cubic root of 68909868 is about 409.9779246492.

The spelling of 68909868 in words is "sixty-eight million, nine hundred nine thousand, eight hundred sixty-eight".