28089270909 has 72 divisors (see below), whose sum is σ = 48509430720. Its totient is φ = 15736337856.

The previous prime is 28089270899. The next prime is 28089270917. The reversal of 28089270909 is 90907298082.

28089270909 is a `hidden beast` number, since 280 + 8 + 9 + 270 + 90 + 9 = 666.

It is not a de Polignac number, because 28089270909 - 2⁵ = 28089270877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28089270709) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 168199144 + ... + 168199310.

Almost surely, 2^28089270909 is an apocalyptic number.

It is an amenable number.

28089270909 is a deficient number, since it is larger than the sum of its proper divisors (20420159811).

28089270909 is an frugal number, since it uses more digits than its factorization.

28089270909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 28089270909 in words is "twenty-eight billion, eighty-nine million, two hundred seventy thousand, nine hundred nine".