2809449 has 6 divisors (see below), whose sum is σ = 4058106. Its totient is φ = 1872960.

The previous prime is 2809439. The next prime is 2809451. The reversal of 2809449 is 9449082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2782224 + 27225 = 1668^2 + 165^2 .

It is not a de Polignac number, because 2809449 - 2¹² = 2805353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2809409) 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 in 5 ways as a sum of consecutive naturals, for example, 156072 + ... + 156089.

It is an arithmetic number, because the mean of its divisors is an integer number (676351).

2^2809449 is an apocalyptic number.

It is an amenable number.

2809449 is a deficient number, since it is larger than the sum of its proper divisors (1248657).

2809449 is a wasteful number, since it uses less digits than its factorization.

2809449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312167 (or 312164 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2809449 is about 1676.1411038454. The cubic root of 2809449 is about 141.1043440701.

The spelling of 2809449 in words is "two million, eight hundred nine thousand, four hundred forty-nine".