728004427 has 2 divisors, whose sum is σ = 728004428. Its totient is φ = 728004426.

The previous prime is 728004401. The next prime is 728004451. The reversal of 728004427 is 724400827.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728004427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 728004392 and 728004401.

It is not a weakly prime, because it can be changed into another prime (728004727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364002213 + 364002214.

It is an arithmetic number, because the mean of its divisors is an integer number (364002214).

Almost surely, 2^728004427 is an apocalyptic number.

728004427 is a deficient number, since it is larger than the sum of its proper divisors (1).

728004427 is an equidigital number, since it uses as much as digits as its factorization.

728004427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 728004427 is about 26981.5571641075. The cubic root of 728004427 is about 899.5901125300.

The spelling of 728004427 in words is "seven hundred twenty-eight million, four thousand, four hundred twenty-seven".