728419457 has 2 divisors, whose sum is σ = 728419458. Its totient is φ = 728419456.

The previous prime is 728419427. The next prime is 728419589. The reversal of 728419457 is 754914827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370793536 + 357625921 = 19256^2 + 18911^2 .

It is a cyclic number.

It is not a de Polignac number, because 728419457 - 2⁸ = 728419201 is a prime.

It is not a weakly prime, because it can be changed into another prime (728419427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364209728 + 364209729.

It is an arithmetic number, because the mean of its divisors is an integer number (364209729).

Almost surely, 2^728419457 is an apocalyptic number.

It is an amenable number.

728419457 is a deficient number, since it is larger than the sum of its proper divisors (1).

728419457 is an equidigital number, since it uses as much as digits as its factorization.

728419457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 728419457 is about 26989.2470624877. The cubic root of 728419457 is about 899.7610299694.

The spelling of 728419457 in words is "seven hundred twenty-eight million, four hundred nineteen thousand, four hundred fifty-seven".