68679936 has 108 divisors (see below), whose sum is σ = 213346588. Its totient is φ = 21123072.

The previous prime is 68679857. The next prime is 68679959. The reversal of 68679936 is 63997686.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14745600 + 53934336 = 3840^2 + 7344^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28806 + ... + 31098.

Almost surely, 2^68679936 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 68679936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106673294).

68679936 is an abundant number, since it is smaller than the sum of its proper divisors (144666652).

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

68679936 is a wasteful number, since it uses less digits than its factorization.

68679936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328 (or 2311 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 68679936 is about 8287.3358807279. The cubic root of 68679936 is about 409.5214245434.

The spelling of 68679936 in words is "sixty-eight million, six hundred seventy-nine thousand, nine hundred thirty-six".