28645687606 has 8 divisors (see below), whose sum is σ = 42969514104. Its totient is φ = 14322516240.

The previous prime is 28645687597. The next prime is 28645687607. The reversal of 28645687606 is 60678654682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28645687606² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645687607) 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 3 ways as a sum of consecutive naturals, for example, 33855 + ... + 241738.

It is an arithmetic number, because the mean of its divisors is an integer number (5371189263).

Almost surely, 2^28645687606 is an apocalyptic number.

28645687606 is a deficient number, since it is larger than the sum of its proper divisors (14323826498).

28645687606 is a wasteful number, since it uses less digits than its factorization.

28645687606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327566.

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 28645687606 in words is "twenty-eight billion, six hundred forty-five million, six hundred eighty-seven thousand, six hundred six".