28656149 has 2 divisors, whose sum is σ = 28656150. Its totient is φ = 28656148.

The previous prime is 28656143. The next prime is 28656151. The reversal of 28656149 is 94165682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27636049 + 1020100 = 5257^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 28656149 - 2¹² = 28652053 is a prime.

Together with 28656151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28656143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14328074 + 14328075.

It is an arithmetic number, because the mean of its divisors is an integer number (14328075).

Almost surely, 2^28656149 is an apocalyptic number.

It is an amenable number.

28656149 is a deficient number, since it is larger than the sum of its proper divisors (1).

28656149 is an equidigital number, since it uses as much as digits as its factorization.

28656149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 28656149 is about 5353.1438426405. The cubic root of 28656149 is about 306.0125765546.

The spelling of 28656149 in words is "twenty-eight million, six hundred fifty-six thousand, one hundred forty-nine".