68824728 has 80 divisors (see below), whose sum is σ = 220326480. Its totient is φ = 19662912.

The previous prime is 68824727. The next prime is 68824741. The reversal of 68824728 is 82742886.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68824727) 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 19 ways as a sum of consecutive naturals, for example, 3051 + ... + 12122.

It is an arithmetic number, because the mean of its divisors is an integer number (2754081).

Almost surely, 2^68824728 is an apocalyptic number.

It is an amenable number.

68824728 is an abundant number, since it is smaller than the sum of its proper divisors (151501752).

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

68824728 is a wasteful number, since it uses less digits than its factorization.

68824728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15198 (or 15185 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 68824728 is about 8296.0670199800. The cubic root of 68824728 is about 409.8090088032.

The spelling of 68824728 in words is "sixty-eight million, eight hundred twenty-four thousand, seven hundred twenty-eight".