728479 has 8 divisors (see below), whose sum is σ = 800640. Its totient is φ = 659736.

The previous prime is 728477. The next prime is 728489. The reversal of 728479 is 974827.

It is a happy number.

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 728479 - 2¹ = 728477 is a prime.

It is a d-powerful number, because it can be written as 7 + 2¹⁷ + 4⁷ + 8⁵ + 7⁵ + 9⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397 + ... + 1270.

It is an arithmetic number, because the mean of its divisors is an integer number (100080).

2⁷²⁸⁴⁷⁹ is an apocalyptic number.

728479 is a deficient number, since it is larger than the sum of its proper divisors (72161).

728479 is a wasteful number, since it uses less digits than its factorization.

728479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709.

The product of its digits is 28224, while the sum is 37.

The square root of 728479 is about 853.5098124802. The cubic root of 728479 is about 89.9785545611.

The spelling of 728479 in words is "seven hundred twenty-eight thousand, four hundred seventy-nine".