28101449 has 2 divisors, whose sum is σ = 28101450. Its totient is φ = 28101448.

The previous prime is 28101433. The next prime is 28101457. The reversal of 28101449 is 94410182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28090000 + 11449 = 5300^2 + 107^2 .

It is a cyclic number.

It is not a de Polignac number, because 28101449 - 2⁴ = 28101433 is a prime.

It is not a weakly prime, because it can be changed into another prime (28101499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14050724 + 14050725.

It is an arithmetic number, because the mean of its divisors is an integer number (14050725).

Almost surely, 2^28101449 is an apocalyptic number.

It is an amenable number.

28101449 is a deficient number, since it is larger than the sum of its proper divisors (1).

28101449 is an equidigital number, since it uses as much as digits as its factorization.

28101449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 28101449 is about 5301.0799843051. The cubic root of 28101449 is about 304.0251919624.

The spelling of 28101449 in words is "twenty-eight million, one hundred one thousand, four hundred forty-nine".