28944885199 has 4 divisors (see below), whose sum is σ = 29023754464. Its totient is φ = 28866015936.

The previous prime is 28944885197. The next prime is 28944885217. The reversal of 28944885199 is 99158844982.

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 28944885199 - 2¹ = 28944885197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28944885197) 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, 39434082 + ... + 39434815.

It is an arithmetic number, because the mean of its divisors is an integer number (7255938616).

Almost surely, 2^28944885199 is an apocalyptic number.

28944885199 is a deficient number, since it is larger than the sum of its proper divisors (78869265).

28944885199 is an equidigital number, since it uses as much as digits as its factorization.

28944885199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78869264.

The product of its digits is 59719680, while the sum is 67.

The spelling of 28944885199 in words is "twenty-eight billion, nine hundred forty-four million, eight hundred eighty-five thousand, one hundred ninety-nine".