726928 has 10 divisors (see below), whose sum is σ = 1408454. Its totient is φ = 363456.

The previous prime is 726923. The next prime is 726941. The reversal of 726928 is 829627.

It can be written as a sum of positive squares in only one way, i.e., 725904 + 1024 = 852^2 + 32^2 .

It is a junction number, because it is equal to n+sod(n) for n = 726893 and 726902.

It is not an unprimeable number, because it can be changed into a prime (726923) by changing a digit.

726928 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 as a sum of consecutive naturals, namely, 22701 + ... + 22732.

2⁷²⁶⁹²⁸ is an apocalyptic number.

It is an amenable number.

726928 is a deficient number, since it is larger than the sum of its proper divisors (681526).

726928 is a wasteful number, since it uses less digits than its factorization.

726928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45441 (or 45435 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 726928 is about 852.6007271871. The cubic root of 726928 is about 89.9146515987.

The spelling of 726928 in words is "seven hundred twenty-six thousand, nine hundred twenty-eight".