68688436 has 36 divisors (see below), whose sum is σ = 126118944. Its totient is φ = 32728560.

The previous prime is 68688377. The next prime is 68688437. The reversal of 68688436 is 63488686.

It is a self number, because there is not a number n which added to its sum of digits gives 68688436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68688437) 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, 411225 + ... + 411391.

It is an arithmetic number, because the mean of its divisors is an integer number (3503304).

Almost surely, 2^68688436 is an apocalyptic number.

It is an amenable number.

68688436 is a deficient number, since it is larger than the sum of its proper divisors (57430508).

68688436 is a wasteful number, since it uses less digits than its factorization.

68688436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 307 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

The square root of 68688436 is about 8287.8486955301. The cubic root of 68688436 is about 409.5383183104.

The spelling of 68688436 in words is "sixty-eight million, six hundred eighty-eight thousand, four hundred thirty-six".