728888 has 16 divisors (see below), whose sum is σ = 1377000. Its totient is φ = 361696.

The previous prime is 728881. The next prime is 728891. The reversal of 728888 is 888827.

728888 is a modest number, since divided by 888 gives 728 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728881) by changing a digit.

728888 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 1178 + ... + 1686.

2⁷²⁸⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

728888 is a deficient number, since it is larger than the sum of its proper divisors (648112).

728888 is a wasteful number, since it uses less digits than its factorization.

728888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694 (or 690 counting only the distinct ones).

The product of its digits is 57344, while the sum is 41.

The square root of 728888 is about 853.7493777450. The cubic root of 728888 is about 89.9953907104.

It can be divided in two parts, 72 and 8888, that multiplied together give a palindrome (639936).

The spelling of 728888 in words is "seven hundred twenty-eight thousand, eight hundred eighty-eight".