728238 has 24 divisors (see below), whose sum is σ = 1694952. Its totient is φ = 207984.

The previous prime is 728209. The next prime is 728261. The reversal of 728238 is 832827.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

728238 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 11 ways as a sum of consecutive naturals, for example, 945 + ... + 1532.

It is an arithmetic number, because the mean of its divisors is an integer number (70623).

2⁷²⁸²³⁸ is an apocalyptic number.

728238 is an abundant number, since it is smaller than the sum of its proper divisors (966714).

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

728238 is a wasteful number, since it uses less digits than its factorization.

728238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496 (or 2489 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 728238 is about 853.3686190621. The cubic root of 728238 is about 89.9686310431.

The spelling of 728238 in words is "seven hundred twenty-eight thousand, two hundred thirty-eight".