68640952 has 16 divisors (see below), whose sum is σ = 129052440. Its totient is φ = 34226976.

The previous prime is 68640937. The next prime is 68640953. The reversal of 68640952 is 25904686.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68640953) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8518 + ... + 14485.

Almost surely, 2^68640952 is an apocalyptic number.

It is an amenable number.

68640952 is a deficient number, since it is larger than the sum of its proper divisors (60411488).

68640952 is a wasteful number, since it uses less digits than its factorization.

68640952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23382 (or 23378 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 68640952 is about 8284.9835244254. The cubic root of 68640952 is about 409.4439259039.

The spelling of 68640952 in words is "sixty-eight million, six hundred forty thousand, nine hundred fifty-two".