728260663 has 4 divisors (see below), whose sum is σ = 784280728. Its totient is φ = 672240600.

The previous prime is 728260657. The next prime is 728260693. The reversal of 728260663 is 366062827.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 728260663 - 2¹³ = 728252471 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 (728260693) 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, 28010013 + ... + 28010038.

It is an arithmetic number, because the mean of its divisors is an integer number (196070182).

Almost surely, 2^728260663 is an apocalyptic number.

728260663 is a deficient number, since it is larger than the sum of its proper divisors (56020065).

728260663 is a wasteful number, since it uses less digits than its factorization.

728260663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56020064.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 728260663 is about 26986.3051009211. The cubic root of 728260663 is about 899.6956431765.

The spelling of 728260663 in words is "seven hundred twenty-eight million, two hundred sixty thousand, six hundred sixty-three".