728018440 has 64 divisors (see below), whose sum is σ = 1727812800. Its totient is φ = 275311872.

The previous prime is 728018413. The next prime is 728018443. The reversal of 728018440 is 44810827.

It is a junction number, because it is equal to n+sod(n) for n = 728018396 and 728018405.

It is not an unprimeable number, because it can be changed into a prime (728018443) 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 15 ways as a sum of consecutive naturals, for example, 647719 + ... + 648841.

It is an arithmetic number, because the mean of its divisors is an integer number (26997075).

Almost surely, 2^728018440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728018440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (863906400).

728018440 is an abundant number, since it is smaller than the sum of its proper divisors (999794360).

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

728018440 is a wasteful number, since it uses less digits than its factorization.

728018440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006 (or 2002 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 728018440 is about 26981.8168402352. The cubic root of 728018440 is about 899.5958844159.

The spelling of 728018440 in words is "seven hundred twenty-eight million, eighteen thousand, four hundred forty".