28285541 has 2 divisors, whose sum is σ = 28285542. Its totient is φ = 28285540.

The previous prime is 28285513. The next prime is 28285571. The reversal of 28285541 is 14558282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14853316 + 13432225 = 3854^2 + 3665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28285541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28285511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14142770 + 14142771.

It is an arithmetic number, because the mean of its divisors is an integer number (14142771).

Almost surely, 2^28285541 is an apocalyptic number.

It is an amenable number.

28285541 is a deficient number, since it is larger than the sum of its proper divisors (1).

28285541 is an equidigital number, since it uses as much as digits as its factorization.

28285541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25600, while the sum is 35.

The square root of 28285541 is about 5318.4152714883. The cubic root of 28285541 is about 304.6876350523.

The spelling of 28285541 in words is "twenty-eight million, two hundred eighty-five thousand, five hundred forty-one".