728938 has 8 divisors (see below), whose sum is σ = 1249632. Its totient is φ = 312396.

The previous prime is 728929. The next prime is 728941. The reversal of 728938 is 839827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 728897 and 728906.

It is an unprimeable number.

728938 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26020 + ... + 26047.

It is an arithmetic number, because the mean of its divisors is an integer number (156204).

2⁷²⁸⁹³⁸ is an apocalyptic number.

728938 is a deficient number, since it is larger than the sum of its proper divisors (520694).

728938 is a wasteful number, since it uses less digits than its factorization.

728938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52076.

The product of its digits is 24192, while the sum is 37.

The square root of 728938 is about 853.7786598411. The cubic root of 728938 is about 89.9974484873.

Subtracting 728938 from its reverse (839827), we obtain a square (110889 = 333²).

It can be divided in two parts, 7 and 28938, that multiplied together give a triangular number (202566 = T₆₃₆).

The spelling of 728938 in words is "seven hundred twenty-eight thousand, nine hundred thirty-eight".