728353 has 4 divisors (see below), whose sum is σ = 730800. Its totient is φ = 725908.

The previous prime is 728333. The next prime is 728369. The reversal of 728353 is 353827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 353827 = 67 ⋅5281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728303) 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, 703 + ... + 1396.

It is an arithmetic number, because the mean of its divisors is an integer number (182700).

2⁷²⁸³⁵³ is an apocalyptic number.

It is an amenable number.

728353 is a deficient number, since it is larger than the sum of its proper divisors (2447).

728353 is a wasteful number, since it uses less digits than its factorization.

728353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446.

The product of its digits is 5040, while the sum is 28.

The square root of 728353 is about 853.4359964286. The cubic root of 728353 is about 89.9733666048.

It can be divided in two parts, 728 and 353, that added together give a triangular number (1081 = T₄₆).

The spelling of 728353 in words is "seven hundred twenty-eight thousand, three hundred fifty-three".