728856061 has 2 divisors, whose sum is σ = 728856062. Its totient is φ = 728856060.

The previous prime is 728856019. The next prime is 728856067. The reversal of 728856061 is 160658827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 721996900 + 6859161 = 26870^2 + 2619^2 .

It is a cyclic number.

It is not a de Polignac number, because 728856061 - 2⁹ = 728855549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 728855999 and 728856017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728856067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364428030 + 364428031.

It is an arithmetic number, because the mean of its divisors is an integer number (364428031).

Almost surely, 2^728856061 is an apocalyptic number.

It is an amenable number.

728856061 is a deficient number, since it is larger than the sum of its proper divisors (1).

728856061 is an equidigital number, since it uses as much as digits as its factorization.

728856061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 728856061 is about 26997.3343313743. The cubic root of 728856061 is about 899.9407619447.

The spelling of 728856061 in words is "seven hundred twenty-eight million, eight hundred fifty-six thousand, sixty-one".