68917638 has 24 divisors (see below), whose sum is σ = 141299784. Its totient is φ = 22408960.

The previous prime is 68917633. The next prime is 68917657. The reversal of 68917638 is 83671986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68917631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6670 + ... + 13502.

It is an arithmetic number, because the mean of its divisors is an integer number (5887491).

Almost surely, 2^68917638 is an apocalyptic number.

68917638 is an abundant number, since it is smaller than the sum of its proper divisors (72382146).

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

68917638 is a wasteful number, since it uses less digits than its factorization.

68917638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6920 (or 6879 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 68917638 is about 8301.6647728031. The cubic root of 68917638 is about 409.9933332249.

The spelling of 68917638 in words is "sixty-eight million, nine hundred seventeen thousand, six hundred thirty-eight".