728143328 has 24 divisors (see below), whose sum is σ = 1563854040. Its totient is φ = 330974080.

The previous prime is 728143321. The next prime is 728143349. The reversal of 728143328 is 823341827.

728143328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×728143328² = 1060385412221831168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 728143291 and 728143300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728143321) 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, 1033943 + ... + 1034646.

It is an arithmetic number, because the mean of its divisors is an integer number (65160585).

Almost surely, 2^728143328 is an apocalyptic number.

It is an amenable number.

728143328 is an abundant number, since it is smaller than the sum of its proper divisors (835710712).

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

728143328 is a wasteful number, since it uses less digits than its factorization.

728143328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068610 (or 2068602 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 728143328 is about 26984.1310402985. The cubic root of 728143328 is about 899.6473218983.

The spelling of 728143328 in words is "seven hundred twenty-eight million, one hundred forty-three thousand, three hundred twenty-eight".