728515880 has 64 divisors (see below), whose sum is σ = 1700697600. Its totient is φ = 280650240.

The previous prime is 728515871. The next prime is 728515883. The reversal of 728515880 is 88515827.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (728515883) 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, 126749 + ... + 132371.

It is an arithmetic number, because the mean of its divisors is an integer number (26573400).

Almost surely, 2^728515880 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 728515880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850348800).

728515880 is an abundant number, since it is smaller than the sum of its proper divisors (972181720).

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

728515880 is a wasteful number, since it uses less digits than its factorization.

728515880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5754 (or 5750 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 44.

The square root of 728515880 is about 26991.0333259029. The cubic root of 728515880 is about 899.8007295450.

The spelling of 728515880 in words is "seven hundred twenty-eight million, five hundred fifteen thousand, eight hundred eighty".