728698 has 4 divisors (see below), whose sum is σ = 1093050. Its totient is φ = 364348.

The previous prime is 728687. The next prime is 728699. The reversal of 728698 is 896827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 896827 = 283 ⋅3169.

It can be written as a sum of positive squares in only one way, i.e., 727609 + 1089 = 853^2 + 33^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 728698.

It is not an unprimeable number, because it can be changed into a prime (728699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182173 + ... + 182176.

2⁷²⁸⁶⁹⁸ is an apocalyptic number.

728698 is a deficient number, since it is larger than the sum of its proper divisors (364352).

728698 is a wasteful number, since it uses less digits than its factorization.

728698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364351.

The product of its digits is 48384, while the sum is 40.

The square root of 728698 is about 853.6380966194. The cubic root of 728698 is about 89.9875702999.

The spelling of 728698 in words is "seven hundred twenty-eight thousand, six hundred ninety-eight".