728606447 has 8 divisors (see below), whose sum is σ = 740987520. Its totient is φ = 716327640.

The previous prime is 728606429. The next prime is 728606507. The reversal of 728606447 is 744606827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728606447 - 2⁸ = 728606191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728606398 and 728606407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728602447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11129 + ... + 39762.

It is an arithmetic number, because the mean of its divisors is an integer number (92623440).

Almost surely, 2^728606447 is an apocalyptic number.

728606447 is a deficient number, since it is larger than the sum of its proper divisors (12381073).

728606447 is a wasteful number, since it uses less digits than its factorization.

728606447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51133.

The product of its (nonzero) digits is 451584, while the sum is 44.

The square root of 728606447 is about 26992.7109976008. The cubic root of 728606447 is about 899.8380148800.

The spelling of 728606447 in words is "seven hundred twenty-eight million, six hundred six thousand, four hundred forty-seven".