728418 has 8 divisors (see below), whose sum is σ = 1456848. Its totient is φ = 242804.

The previous prime is 728417. The next prime is 728423. The reversal of 728418 is 814827.

728418 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

728418 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (728417) 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, 60696 + ... + 60707.

It is an arithmetic number, because the mean of its divisors is an integer number (182106).

2⁷²⁸⁴¹⁸ is an apocalyptic number.

728418 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.

728418 is a wasteful number, since it uses less digits than its factorization.

728418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121408.

The product of its digits is 3584, while the sum is 30.

The square root of 728418 is about 853.4740769350. The cubic root of 728418 is about 89.9760430062.

The spelling of 728418 in words is "seven hundred twenty-eight thousand, four hundred eighteen".