28684481645 has 16 divisors (see below), whose sum is σ = 35219603520. Its totient is φ = 22420209024.

The previous prime is 28684481641. The next prime is 28684481737. The reversal of 28684481645 is 54618448682.

It is a cyclic number.

It is not a de Polignac number, because 28684481645 - 2² = 28684481641 is a prime.

It is a super-3 number, since 3×28684481645³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28684481641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250184 + ... + 346353.

It is an arithmetic number, because the mean of its divisors is an integer number (2201225220).

Almost surely, 2^28684481645 is an apocalyptic number.

It is an amenable number.

28684481645 is a deficient number, since it is larger than the sum of its proper divisors (6535121875).

28684481645 is a wasteful number, since it uses less digits than its factorization.

28684481645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596764.

The product of its digits is 11796480, while the sum is 56.

The spelling of 28684481645 in words is "twenty-eight billion, six hundred eighty-four million, four hundred eighty-one thousand, six hundred forty-five".