728147 has 4 divisors (see below), whose sum is σ = 832176. Its totient is φ = 624120.

The previous prime is 728131. The next prime is 728173. The reversal of 728147 is 741827.

728147 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 not a de Polignac number, because 728147 - 2⁴ = 728131 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728147.

It is not an unprimeable number, because it can be changed into a prime (728047) 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, 52004 + ... + 52017.

It is an arithmetic number, because the mean of its divisors is an integer number (208044).

2⁷²⁸¹⁴⁷ is an apocalyptic number.

728147 is a deficient number, since it is larger than the sum of its proper divisors (104029).

728147 is a wasteful number, since it uses less digits than its factorization.

728147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104028.

The product of its digits is 3136, while the sum is 29.

The square root of 728147 is about 853.3152992886. The cubic root of 728147 is about 89.9648834192.

The spelling of 728147 in words is "seven hundred twenty-eight thousand, one hundred forty-seven".