28383323847 has 4 divisors (see below), whose sum is σ = 37844431800. Its totient is φ = 18922215896.

The previous prime is 28383323797. The next prime is 28383323861. The reversal of 28383323847 is 74832338382.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28383323847 - 2¹⁹ = 28382799559 is a prime.

It is a super-2 number, since 2×28383323847² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28383323847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28383723847) 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, 4730553972 + ... + 4730553977.

It is an arithmetic number, because the mean of its divisors is an integer number (9461107950).

Almost surely, 2^28383323847 is an apocalyptic number.

28383323847 is a deficient number, since it is larger than the sum of its proper divisors (9461107953).

28383323847 is an equidigital number, since it uses as much as digits as its factorization.

28383323847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461107952.

The product of its digits is 4644864, while the sum is 51.

The spelling of 28383323847 in words is "twenty-eight billion, three hundred eighty-three million, three hundred twenty-three thousand, eight hundred forty-seven".