728503061 has 12 divisors (see below), whose sum is σ = 860568480. Its totient is φ = 611329680.

The previous prime is 728503051. The next prime is 728503063. The reversal of 728503061 is 160305827.

It is a happy number.

It is not a de Polignac number, because 728503061 - 2²² = 724308757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728503063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194081 + ... + 197798.

It is an arithmetic number, because the mean of its divisors is an integer number (71714040).

Almost surely, 2^728503061 is an apocalyptic number.

It is an amenable number.

728503061 is a deficient number, since it is larger than the sum of its proper divisors (132065419).

728503061 is a wasteful number, since it uses less digits than its factorization.

728503061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391916 (or 391903 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 728503061 is about 26990.7958571065. The cubic root of 728503061 is about 899.7954518686.

Adding to 728503061 its reverse (160305827), we get a palindrome (888808888).

The spelling of 728503061 in words is "seven hundred twenty-eight million, five hundred three thousand, sixty-one".