28606447069 has 4 divisors (see below), whose sum is σ = 28754667196. Its totient is φ = 28458226944.

The previous prime is 28606447031. The next prime is 28606447091. The reversal of 28606447069 is 96074460682.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6563106169 + 22043340900 = 81013^2 + 148470^2 .

It is a cyclic number.

It is not a de Polignac number, because 28606447069 - 2¹⁹ = 28605922781 is a prime.

It is a super-2 number, since 2×28606447069² (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 (28606447369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74109774 + ... + 74110159.

It is an arithmetic number, because the mean of its divisors is an integer number (7188666799).

Almost surely, 2^28606447069 is an apocalyptic number.

It is an amenable number.

28606447069 is a deficient number, since it is larger than the sum of its proper divisors (148220127).

28606447069 is a wasteful number, since it uses less digits than its factorization.

28606447069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148220126.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 28606447069 in words is "twenty-eight billion, six hundred six million, four hundred forty-seven thousand, sixty-nine".