28627666369 has 16 divisors (see below), whose sum is σ = 29918750400. Its totient is φ = 27371203776.

The previous prime is 28627666367. The next prime is 28627666387. The reversal of 28627666369 is 96366672682.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28627666369 - 2¹ = 28627666367 is a prime.

It is a super-3 number, since 3×28627666369³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28627666367) 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, 352227 + ... + 425815.

It is an arithmetic number, because the mean of its divisors is an integer number (1869921900).

Almost surely, 2^28627666369 is an apocalyptic number.

It is an amenable number.

28627666369 is a deficient number, since it is larger than the sum of its proper divisors (1291084031).

28627666369 is a wasteful number, since it uses less digits than its factorization.

28627666369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73824.

The product of its digits is 47029248, while the sum is 61.

The spelling of 28627666369 in words is "twenty-eight billion, six hundred twenty-seven million, six hundred sixty-six thousand, three hundred sixty-nine".