727728 has 20 divisors (see below), whose sum is σ = 1880088. Its totient is φ = 242560.

The previous prime is 727717. The next prime is 727729. The reversal of 727728 is 827727.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (727729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7533 + ... + 7628.

2⁷²⁷⁷²⁸ is an apocalyptic number.

It is an amenable number.

727728 is an abundant number, since it is smaller than the sum of its proper divisors (1152360).

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

727728 is a wasteful number, since it uses less digits than its factorization.

727728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15172 (or 15166 counting only the distinct ones).

The product of its digits is 10976, while the sum is 33.

The square root of 727728 is about 853.0697509583. The cubic root of 727728 is about 89.9476238462.

Subtracting 727728 from its reverse (827727), we obtain a palindrome (99999).

The spelling of 727728 in words is "seven hundred twenty-seven thousand, seven hundred twenty-eight".