28335261 has 4 divisors (see below), whose sum is σ = 37780352. Its totient is φ = 18890172.

The previous prime is 28335259. The next prime is 28335269. The reversal of 28335261 is 16253382.

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 not a de Polignac number, because 28335261 - 2¹ = 28335259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28335269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4722541 + ... + 4722546.

It is an arithmetic number, because the mean of its divisors is an integer number (9445088).

Almost surely, 2^28335261 is an apocalyptic number.

It is an amenable number.

28335261 is a deficient number, since it is larger than the sum of its proper divisors (9445091).

28335261 is an equidigital number, since it uses as much as digits as its factorization.

28335261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9445090.

The product of its digits is 8640, while the sum is 30.

The square root of 28335261 is about 5323.0875438978. The cubic root of 28335261 is about 304.8660560294.

The spelling of 28335261 in words is "twenty-eight million, three hundred thirty-five thousand, two hundred sixty-one".