68639600 has 60 divisors (see below), whose sum is σ = 166637400. Its totient is φ = 27168000.

The previous prime is 68639587. The next prime is 68639621. The reversal of 68639600 is 693686.

It is a happy number.

It is a super-2 number, since 2×68639600² = 9422789376320000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39551 + ... + 41249.

It is an arithmetic number, because the mean of its divisors is an integer number (2777290).

Almost surely, 2^68639600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68639600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83318700).

68639600 is an abundant number, since it is smaller than the sum of its proper divisors (97997800).

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

68639600 is a wasteful number, since it uses less digits than its factorization.

68639600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818 (or 1807 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 68639600 is about 8284.9019306205. The cubic root of 68639600 is about 409.4412376553.

The spelling of 68639600 in words is "sixty-eight million, six hundred thirty-nine thousand, six hundred".