728169 has 8 divisors (see below), whose sum is σ = 1045632. Its totient is φ = 448080.

The previous prime is 728131. The next prime is 728173. The reversal of 728169 is 961827.

728169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-728169 is a prime.

It is a super-2 number, since 2×728169² = 1060460185122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (728129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9297 + ... + 9374.

It is an arithmetic number, because the mean of its divisors is an integer number (130704).

2⁷²⁸¹⁶⁹ is an apocalyptic number.

It is an amenable number.

728169 is a deficient number, since it is larger than the sum of its proper divisors (317463).

728169 is a wasteful number, since it uses less digits than its factorization.

728169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18687.

The product of its digits is 6048, while the sum is 33.

The square root of 728169 is about 853.3281900887. The cubic root of 728169 is about 89.9657894668.

The spelling of 728169 in words is "seven hundred twenty-eight thousand, one hundred sixty-nine".