28209041 has 4 divisors (see below), whose sum is σ = 32238912. Its totient is φ = 24179172.

The previous prime is 28209037. The next prime is 28209043. The reversal of 28209041 is 14090282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28209041 - 2² = 28209037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28209041.

It is not an unprimeable number, because it can be changed into a prime (28209043) 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, 2014925 + ... + 2014938.

It is an arithmetic number, because the mean of its divisors is an integer number (8059728).

Almost surely, 2^28209041 is an apocalyptic number.

It is an amenable number.

28209041 is a deficient number, since it is larger than the sum of its proper divisors (4029871).

28209041 is an equidigital number, since it uses as much as digits as its factorization.

28209041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029870.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28209041 is about 5311.2184101202. The cubic root of 28209041 is about 304.4127048456.

The spelling of 28209041 in words is "twenty-eight million, two hundred nine thousand, forty-one".