302420209 has 12 divisors (see below), whose sum is σ = 378856884. Its totient is φ = 239277024.

The previous prime is 302420189. The next prime is 302420263. The reversal of 302420209 is 902024203.

It can be written as a sum of positive squares in 2 ways, for example, as 206928225 + 95491984 = 14385^2 + 9772^2 .

It is not a de Polignac number, because 302420209 - 2⁵ = 302420177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 302420209.

It is not an unprimeable number, because it can be changed into a prime (302420509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236742 + ... + 238015.

It is an arithmetic number, because the mean of its divisors is an integer number (31571407).

Almost surely, 2^302420209 is an apocalyptic number.

It is an amenable number.

302420209 is a deficient number, since it is larger than the sum of its proper divisors (76436675).

302420209 is a wasteful number, since it uses less digits than its factorization.

302420209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474784 (or 474777 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 302420209 is about 17390.2331496734. The cubic root of 302420209 is about 671.2283170221.

The spelling of 302420209 in words is "three hundred two million, four hundred twenty thousand, two hundred nine".