28145849 has 2 divisors, whose sum is σ = 28145850. Its totient is φ = 28145848.

The previous prime is 28145839. The next prime is 28145879. The reversal of 28145849 is 94854182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22231225 + 5914624 = 4715^2 + 2432^2 .

It is a cyclic number.

It is not a de Polignac number, because 28145849 - 2⁴ = 28145833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28145839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14072924 + 14072925.

It is an arithmetic number, because the mean of its divisors is an integer number (14072925).

Almost surely, 2^28145849 is an apocalyptic number.

It is an amenable number.

28145849 is a deficient number, since it is larger than the sum of its proper divisors (1).

28145849 is an equidigital number, since it uses as much as digits as its factorization.

28145849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 41.

The square root of 28145849 is about 5305.2661573195. The cubic root of 28145849 is about 304.1852265983.

The spelling of 28145849 in words is "twenty-eight million, one hundred forty-five thousand, eight hundred forty-nine".