28645849 has 2 divisors, whose sum is σ = 28645850. Its totient is φ = 28645848.

The previous prime is 28645847. The next prime is 28645861. The reversal of 28645849 is 94854682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24206400 + 4439449 = 4920^2 + 2107^2 .

It is a cyclic number.

It is not a de Polignac number, because 28645849 - 2¹ = 28645847 is a prime.

Together with 28645847, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28645799 and 28645808.

It is not a weakly prime, because it can be changed into another prime (28645847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14322924 + 14322925.

It is an arithmetic number, because the mean of its divisors is an integer number (14322925).

Almost surely, 2^28645849 is an apocalyptic number.

It is an amenable number.

28645849 is a deficient number, since it is larger than the sum of its proper divisors (1).

28645849 is an equidigital number, since it uses as much as digits as its factorization.

28645849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 46.

The square root of 28645849 is about 5352.1817046883. The cubic root of 28645849 is about 305.9759083657.

The spelling of 28645849 in words is "twenty-eight million, six hundred forty-five thousand, eight hundred forty-nine".