68536728 has 96 divisors (see below), whose sum is σ = 205405200. Its totient is φ = 20507904.

The previous prime is 68536697. The next prime is 68536751. The reversal of 68536728 is 82763586.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 33643 + ... + 35621.

Almost surely, 2^68536728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68536728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102702600).

68536728 is an abundant number, since it is smaller than the sum of its proper divisors (136868472).

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

68536728 is a wasteful number, since it uses less digits than its factorization.

68536728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041 (or 2034 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 68536728 is about 8278.6912009085. The cubic root of 68536728 is about 409.2365885476.

The spelling of 68536728 in words is "sixty-eight million, five hundred thirty-six thousand, seven hundred twenty-eight".