68873728 has 80 divisors (see below), whose sum is σ = 171667584. Its totient is φ = 26818560.

The previous prime is 68873719. The next prime is 68873737. The reversal of 68873728 is 82737886.

It is an interprime number because it is at equal distance from previous prime (68873719) and next prime (68873737).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38551 + ... + 40297.

Almost surely, 2^68873728 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 68873728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85833792).

68873728 is an abundant number, since it is smaller than the sum of its proper divisors (102793856).

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

68873728 is a wasteful number, since it uses less digits than its factorization.

68873728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783 (or 1767 counting only the distinct ones).

The product of its digits is 903168, while the sum is 49.

The square root of 68873728 is about 8299.0197011454. The cubic root of 68873728 is about 409.9062407062.

The spelling of 68873728 in words is "sixty-eight million, eight hundred seventy-three thousand, seven hundred twenty-eight".