2828209 has 2 divisors, whose sum is σ = 2828210. Its totient is φ = 2828208.

The previous prime is 2828197. The next prime is 2828219. The reversal of 2828209 is 9028282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2712609 + 115600 = 1647^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 2828209 - 2¹³ = 2820017 is a prime.

It is a super-2 number, since 2×2828209² = 15997532295362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2828219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1414104 + 1414105.

It is an arithmetic number, because the mean of its divisors is an integer number (1414105).

2^2828209 is an apocalyptic number.

It is an amenable number.

2828209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2828209 is an equidigital number, since it uses as much as digits as its factorization.

2828209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2828209 is about 1681.7279803821. The cubic root of 2828209 is about 141.4177207314.

The spelling of 2828209 in words is "two million, eight hundred twenty-eight thousand, two hundred nine".