728758 has 4 divisors (see below), whose sum is σ = 1093140. Its totient is φ = 364378.

The previous prime is 728747. The next prime is 728771. The reversal of 728758 is 857827.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

728758 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, 182188 + ... + 182191.

It is an arithmetic number, because the mean of its divisors is an integer number (273285).

2⁷²⁸⁷⁵⁸ is an apocalyptic number.

728758 is a deficient number, since it is larger than the sum of its proper divisors (364382).

728758 is a wasteful number, since it uses less digits than its factorization.

728758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364381.

The product of its digits is 31360, while the sum is 37.

The square root of 728758 is about 853.6732395946. The cubic root of 728758 is about 89.9900400501.

The spelling of 728758 in words is "seven hundred twenty-eight thousand, seven hundred fifty-eight".