68307636 has 24 divisors (see below), whose sum is σ = 159536160. Its totient is φ = 22747552.

The previous prime is 68307571. The next prime is 68307689. The reversal of 68307636 is 63670386.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 68307594 and 68307603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15130 + ... + 19118.

It is an arithmetic number, because the mean of its divisors is an integer number (6647340).

Almost surely, 2^68307636 is an apocalyptic number.

It is an amenable number.

68307636 is an abundant number, since it is smaller than the sum of its proper divisors (91228524).

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

68307636 is a wasteful number, since it uses less digits than its factorization.

68307636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423 (or 5421 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 68307636 is about 8264.8433741965. The cubic root of 68307636 is about 408.7801058917.

The spelling of 68307636 in words is "sixty-eight million, three hundred seven thousand, six hundred thirty-six".