2878849 has 2 divisors, whose sum is σ = 2878850. Its totient is φ = 2878848.

The previous prime is 2878847. The next prime is 2878853. The reversal of 2878849 is 9488782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2250000 + 628849 = 1500^2 + 793^2 .

It is a cyclic number.

It is not a de Polignac number, because 2878849 - 2¹ = 2878847 is a prime.

Together with 2878847, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2878799 and 2878808.

It is not a weakly prime, because it can be changed into another prime (2878847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1439424 + 1439425.

It is an arithmetic number, because the mean of its divisors is an integer number (1439425).

2^2878849 is an apocalyptic number.

It is an amenable number.

2878849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2878849 is an equidigital number, since it uses as much as digits as its factorization.

2878849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 46.

The square root of 2878849 is about 1696.7171243316. The cubic root of 2878849 is about 142.2567760236.

The spelling of 2878849 in words is "two million, eight hundred seventy-eight thousand, eight hundred forty-nine".