28284912909 has 16 divisors (see below), whose sum is σ = 45712991040. Its totient is φ = 17142371280.

The previous prime is 28284912829. The next prime is 28284912941. The reversal of 28284912909 is 90921948282.

It is not a de Polignac number, because 28284912909 - 2¹³ = 28284904717 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28284911909) 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 15 ways as a sum of consecutive naturals, for example, 47617402 + ... + 47617995.

It is an arithmetic number, because the mean of its divisors is an integer number (2857061940).

Almost surely, 2^28284912909 is an apocalyptic number.

It is an amenable number.

28284912909 is a deficient number, since it is larger than the sum of its proper divisors (17428078131).

28284912909 is a wasteful number, since it uses less digits than its factorization.

28284912909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95235417 (or 95235411 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 28284912909 in words is "twenty-eight billion, two hundred eighty-four million, nine hundred twelve thousand, nine hundred nine".