68306636 has 6 divisors (see below), whose sum is σ = 119536620. Its totient is φ = 34153316.

The previous prime is 68306633. The next prime is 68306659. The reversal of 68306636 is 63660386.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 68306636.

It is not an unprimeable number, because it can be changed into a prime (68306633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8538326 + ... + 8538333.

It is an arithmetic number, because the mean of its divisors is an integer number (19922770).

Almost surely, 2^68306636 is an apocalyptic number.

It is an amenable number.

68306636 is a deficient number, since it is larger than the sum of its proper divisors (51229984).

68306636 is a wasteful number, since it uses less digits than its factorization.

68306636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17076663 (or 17076661 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 68306636 is about 8264.7828767609. The cubic root of 68306636 is about 408.7781110825.

The spelling of 68306636 in words is "sixty-eight million, three hundred six thousand, six hundred thirty-six".