1428728728573 has 2 divisors, whose sum is σ = 1428728728574. Its totient is φ = 1428728728572.

The previous prime is 1428728728481. The next prime is 1428728728591. The reversal of 1428728728573 is 3758278278241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1405462412484 + 23266316089 = 1185522^2 + 152533^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428728728573 - 2⁹ = 1428728728061 is a prime.

It is a super-2 number, since 2×1428728728573² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428728728873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714364364286 + 714364364287.

It is an arithmetic number, because the mean of its divisors is an integer number (714364364287).

Almost surely, 2^{1428728728573} is an apocalyptic number.

It is an amenable number.

1428728728573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428728728573 is an equidigital number, since it uses as much as digits as its factorization.

1428728728573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84295680, while the sum is 64.

The spelling of 1428728728573 in words is "one trillion, four hundred twenty-eight billion, seven hundred twenty-eight million, seven hundred twenty-eight thousand, five hundred seventy-three".