728488761 has 64 divisors (see below), whose sum is σ = 1309679616. Its totient is φ = 347846400.

The previous prime is 728488751. The next prime is 728488781. The reversal of 728488761 is 167884827.

It is not a de Polignac number, because 728488761 - 2¹³ = 728480569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (728488741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1101771 + ... + 1102431.

It is an arithmetic number, because the mean of its divisors is an integer number (20463744).

Almost surely, 2^728488761 is an apocalyptic number.

It is an amenable number.

728488761 is a deficient number, since it is larger than the sum of its proper divisors (581190855).

728488761 is a wasteful number, since it uses less digits than its factorization.

728488761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062.

The product of its digits is 1204224, while the sum is 51.

The square root of 728488761 is about 26990.5309506871. The cubic root of 728488761 is about 899.7895643806.

The spelling of 728488761 in words is "seven hundred twenty-eight million, four hundred eighty-eight thousand, seven hundred sixty-one".