28368188643 has 8 divisors (see below), whose sum is σ = 40049207568. Its totient is φ = 17799647744.

The previous prime is 28368188623. The next prime is 28368188647. The reversal of 28368188643 is 34688186382.

It is a happy number.

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 28368188643 - 2³⁴ = 11188319459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28368188647) 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 7 ways as a sum of consecutive naturals, for example, 278119446 + ... + 278119547.

It is an arithmetic number, because the mean of its divisors is an integer number (5006150946).

Almost surely, 2^28368188643 is an apocalyptic number.

28368188643 is a deficient number, since it is larger than the sum of its proper divisors (11681018925).

28368188643 is a wasteful number, since it uses less digits than its factorization.

28368188643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556239013.

The product of its digits is 10616832, while the sum is 57.

The spelling of 28368188643 in words is "twenty-eight billion, three hundred sixty-eight million, one hundred eighty-eight thousand, six hundred forty-three".