728107 has 4 divisors (see below), whose sum is σ = 735280. Its totient is φ = 720936.

The previous prime is 728087. The next prime is 728113. The reversal of 728107 is 701827.

It is a happy number.

728107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728207) 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, 3432 + ... + 3637.

It is an arithmetic number, because the mean of its divisors is an integer number (183820).

2⁷²⁸¹⁰⁷ is an apocalyptic number.

728107 is a deficient number, since it is larger than the sum of its proper divisors (7173).

728107 is a wasteful number, since it uses less digits than its factorization.

728107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7172.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 728107 is about 853.2918609714. The cubic root of 728107 is about 89.9632360132.

The spelling of 728107 in words is "seven hundred twenty-eight thousand, one hundred seven".