28850041609 has 9 divisors (see below), whose sum is σ = 29884277397. Its totient is φ = 27850456704.

The previous prime is 28850041589. The next prime is 28850041669. The reversal of 28850041609 is 90614005882.

It is a happy number.

The square root of 28850041609 is 169853.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 8507295225 + 20342746384 = 92235^2 + 142628^2 .

It is not a de Polignac number, because 28850041609 - 2⁷ = 28850041481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28850041669) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4922809 + ... + 4928665.

Almost surely, 2^28850041609 is an apocalyptic number.

28850041609 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28850041609 is the 169853-rd square number.

28850041609 is the 84927-th centered octagonal number.

It is an amenable number.

28850041609 is a deficient number, since it is larger than the sum of its proper divisors (1034235788).

28850041609 is an frugal number, since it uses more digits than its factorization.

28850041609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11772 (or 5886 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 28850041609 in words is "twenty-eight billion, eight hundred fifty million, forty-one thousand, six hundred nine".