728174747 has 4 divisors (see below), whose sum is σ = 728433720. Its totient is φ = 727915776.

The previous prime is 728174743. The next prime is 728174761. The reversal of 728174747 is 747471827.

728174747 is nontrivially palindromic in base 5.

728174747 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, and also an emirpimes, since its reverse is a distinct semiprime: 747471827 = 17 ⋅43968931.

It is a cyclic number.

It is not a de Polignac number, because 728174747 - 2² = 728174743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728174743) 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, 125222 + ... + 130907.

It is an arithmetic number, because the mean of its divisors is an integer number (182108430).

Almost surely, 2^728174747 is an apocalyptic number.

728174747 is a deficient number, since it is larger than the sum of its proper divisors (258973).

728174747 is a wasteful number, since it uses less digits than its factorization.

728174747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258972.

The product of its digits is 614656, while the sum is 47.

The square root of 728174747 is about 26984.7132095192. The cubic root of 728174747 is about 899.6602614811.

It can be divided in two parts, 7281 and 74747, that added together give a palindrome (82028).

The spelling of 728174747 in words is "seven hundred twenty-eight million, one hundred seventy-four thousand, seven hundred forty-seven".