68638086 has 24 divisors (see below), whose sum is σ = 162235944. Its totient is φ = 20799360.

The previous prime is 68638069. The next prime is 68638091. The reversal of 68638086 is 68083686.

68638086 is a `hidden beast` number, since 6 + 8 + 638 + 0 + 8 + 6 = 666.

It is a super-2 number, since 2×68638086² = 9422373699486792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173131 + ... + 173526.

It is an arithmetic number, because the mean of its divisors is an integer number (6759831).

Almost surely, 2^68638086 is an apocalyptic number.

68638086 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

68638086 is an abundant number, since it is smaller than the sum of its proper divisors (93597858).

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

68638086 is a wasteful number, since it uses less digits than its factorization.

68638086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346676 (or 346673 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 68638086 is about 8284.8105590894. The cubic root of 68638086 is about 409.4382272522.

The spelling of 68638086 in words is "sixty-eight million, six hundred thirty-eight thousand, eighty-six".