68243634 has 24 divisors (see below), whose sum is σ = 153338640. Its totient is φ = 22747716.

The previous prime is 68243633. The next prime is 68243647. The reversal of 68243634 is 43634286.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (68243633) 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, 69724 + ... + 70695.

It is an arithmetic number, because the mean of its divisors is an integer number (6389110).

Almost surely, 2^68243634 is an apocalyptic number.

68243634 is an abundant number, since it is smaller than the sum of its proper divisors (85095006).

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

68243634 is a wasteful number, since it uses less digits than its factorization.

68243634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140436 (or 140424 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 68243634 is about 8260.9705240970. The cubic root of 68243634 is about 408.6523948414.

The spelling of 68243634 in words is "sixty-eight million, two hundred forty-three thousand, six hundred thirty-four".