28714912209 has 24 divisors (see below), whose sum is σ = 43032738112. Its totient is φ = 19134617040.

The previous prime is 28714912201. The next prime is 28714912301. The reversal of 28714912209 is 90221941782.

28714912209 is a `hidden beast` number, since 287 + 149 + 1 + 220 + 9 = 666.

It is not a de Polignac number, because 28714912209 - 2³ = 28714912201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28714912201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 536007 + ... + 587139.

Almost surely, 2^28714912209 is an apocalyptic number.

It is an amenable number.

28714912209 is a deficient number, since it is larger than the sum of its proper divisors (14317825903).

28714912209 is an equidigital number, since it uses as much as digits as its factorization.

28714912209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53459 (or 53447 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 28714912209 in words is "twenty-eight billion, seven hundred fourteen million, nine hundred twelve thousand, two hundred nine".