728922 has 8 divisors (see below), whose sum is σ = 1457856. Its totient is φ = 242972.

The previous prime is 728921. The next prime is 728927. The reversal of 728922 is 229827.

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

728922 is an admirable number.

It is a super-3 number, since 3×728922³ = 1161888435333700344, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 728922.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728922.

It is not an unprimeable number, because it can be changed into a prime (728921) 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, 60738 + ... + 60749.

It is an arithmetic number, because the mean of its divisors is an integer number (182232).

2⁷²⁸⁹²² is an apocalyptic number.

728922 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728922 is a wasteful number, since it uses less digits than its factorization.

728922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121492.

The product of its digits is 4032, while the sum is 30.

The square root of 728922 is about 853.7692896796. The cubic root of 728922 is about 89.9967900090.

The spelling of 728922 in words is "seven hundred twenty-eight thousand, nine hundred twenty-two".