28430656069 has 16 divisors (see below), whose sum is σ = 29657320560. Its totient is φ = 27236252160.

The previous prime is 28430656057. The next prime is 28430656073. The reversal of 28430656069 is 96065603482.

It can be written as a sum of positive squares in 8 ways, for example, as 75463969 + 28355192100 = 8687^2 + 168390^2 .

It is a cyclic number.

It is not a de Polignac number, because 28430656069 - 2⁷ = 28430655941 is a prime.

It is a super-2 number, since 2×28430656069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28430650069) 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 in 15 ways as a sum of consecutive naturals, for example, 410827 + ... + 475015.

It is an arithmetic number, because the mean of its divisors is an integer number (1853582535).

Almost surely, 2^28430656069 is an apocalyptic number.

It is an amenable number.

28430656069 is a deficient number, since it is larger than the sum of its proper divisors (1226664491).

28430656069 is a wasteful number, since it uses less digits than its factorization.

28430656069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64440.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 28430656069 in words is "twenty-eight billion, four hundred thirty million, six hundred fifty-six thousand, sixty-nine".