228035809 has 4 divisors (see below), whose sum is σ = 233597700. Its totient is φ = 222473920.

The previous prime is 228035803. The next prime is 228035813. The reversal of 228035809 is 908530822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131446225 + 96589584 = 11465^2 + 9828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228035809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228035803) 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, 2780884 + ... + 2780965.

It is an arithmetic number, because the mean of its divisors is an integer number (58399425).

Almost surely, 2^228035809 is an apocalyptic number.

It is an amenable number.

228035809 is a deficient number, since it is larger than the sum of its proper divisors (5561891).

228035809 is an equidigital number, since it uses as much as digits as its factorization.

228035809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561890.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 228035809 is about 15100.8545784667. The cubic root of 228035809 is about 610.9434553995.

The spelling of 228035809 in words is "two hundred twenty-eight million, thirty-five thousand, eight hundred nine".