728879 has 4 divisors (see below), whose sum is σ = 730800. Its totient is φ = 726960.

The previous prime is 728873. The next prime is 728881. The reversal of 728879 is 978827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978827 = 97 ⋅10091.

It is a cyclic number.

It is not a de Polignac number, because 728879 - 2¹² = 724783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728873) 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 3 ways as a sum of consecutive naturals, for example, 179 + ... + 1220.

It is an arithmetic number, because the mean of its divisors is an integer number (182700).

2⁷²⁸⁸⁷⁹ is an apocalyptic number.

728879 is a deficient number, since it is larger than the sum of its proper divisors (1921).

728879 is a wasteful number, since it uses less digits than its factorization.

728879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920.

The product of its digits is 56448, while the sum is 41.

The square root of 728879 is about 853.7441068611. The cubic root of 728879 is about 89.9950203006.

The spelling of 728879 in words is "seven hundred twenty-eight thousand, eight hundred seventy-nine".