728518871 has 2 divisors, whose sum is σ = 728518872. Its totient is φ = 728518870.

The previous prime is 728518853. The next prime is 728518907. The reversal of 728518871 is 178815827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728518871 - 2⁶ = 728518807 is a prime.

It is a super-2 number, since 2×728518871² = 1061479490806229282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728518801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364259435 + 364259436.

It is an arithmetic number, because the mean of its divisors is an integer number (364259436).

Almost surely, 2^728518871 is an apocalyptic number.

728518871 is a deficient number, since it is larger than the sum of its proper divisors (1).

728518871 is an equidigital number, since it uses as much as digits as its factorization.

728518871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250880, while the sum is 47.

The square root of 728518871 is about 26991.0887331356. The cubic root of 728518871 is about 899.8019609528.

The spelling of 728518871 in words is "seven hundred twenty-eight million, five hundred eighteen thousand, eight hundred seventy-one".