28847676845 has 8 divisors (see below), whose sum is σ = 37280074776. Its totient is φ = 21302899776.

The previous prime is 28847676841. The next prime is 28847676853. The reversal of 28847676845 is 54867674882.

It can be written as a sum of positive squares in 4 ways, for example, as 812193001 + 28035483844 = 28499^2 + 167438^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28847676845 - 2² = 28847676841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65), and also a Moran number because the ratio is a prime number: 443810413 = 28847676845 / (2 + 8 + 8 + 4 + 7 + 6 + 7 + 6 + 8 + 4 + 5).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28847676841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221905142 + ... + 221905271.

It is an arithmetic number, because the mean of its divisors is an integer number (4660009347).

Almost surely, 2^28847676845 is an apocalyptic number.

It is an amenable number.

28847676845 is a deficient number, since it is larger than the sum of its proper divisors (8432397931).

28847676845 is a wasteful number, since it uses less digits than its factorization.

28847676845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443810431.

The product of its digits is 144506880, while the sum is 65.

The spelling of 28847676845 in words is "twenty-eight billion, eight hundred forty-seven million, six hundred seventy-six thousand, eight hundred forty-five".