2878229 has 2 divisors, whose sum is σ = 2878230. Its totient is φ = 2878228.

The previous prime is 2878181. The next prime is 2878231. The reversal of 2878229 is 9228782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2235025 + 643204 = 1495^2 + 802^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2878229 is a prime.

It is a Sophie Germain prime.

Together with 2878231, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2878192 and 2878201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2878429) 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, 1439114 + 1439115.

It is an arithmetic number, because the mean of its divisors is an integer number (1439115).

2^2878229 is an apocalyptic number.

It is an amenable number.

2878229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2878229 is an equidigital number, since it uses as much as digits as its factorization.

2878229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 2878229 is about 1696.5344087286. The cubic root of 2878229 is about 142.2465629681.

The spelling of 2878229 in words is "two million, eight hundred seventy-eight thousand, two hundred twenty-nine".