28435549 has 2 divisors, whose sum is σ = 28435550. Its totient is φ = 28435548.

The previous prime is 28435531. The next prime is 28435579. The reversal of 28435549 is 94553482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20313049 + 8122500 = 4507^2 + 2850^2 .

It is a cyclic number.

It is not a de Polignac number, because 28435549 - 2¹⁷ = 28304477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28435579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14217774 + 14217775.

It is an arithmetic number, because the mean of its divisors is an integer number (14217775).

Almost surely, 2^28435549 is an apocalyptic number.

It is an amenable number.

28435549 is a deficient number, since it is larger than the sum of its proper divisors (1).

28435549 is an equidigital number, since it uses as much as digits as its factorization.

28435549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 40.

The square root of 28435549 is about 5332.4993202062. The cubic root of 28435549 is about 305.2253069612.

The spelling of 28435549 in words is "twenty-eight million, four hundred thirty-five thousand, five hundred forty-nine".