2028278339 has 2 divisors, whose sum is σ = 2028278340. Its totient is φ = 2028278338.

The previous prime is 2028278333. The next prime is 2028278353. The reversal of 2028278339 is 9338728202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2028278339 - 2¹² = 2028274243 is a prime.

It is a super-2 number, since 2×2028278339² = 8227826040913197842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2028278339.

It is not a weakly prime, because it can be changed into another prime (2028278333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014139169 + 1014139170.

It is an arithmetic number, because the mean of its divisors is an integer number (1014139170).

Almost surely, 2^2028278339 is an apocalyptic number.

2028278339 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028278339 is an equidigital number, since it uses as much as digits as its factorization.

2028278339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 2028278339 is about 45036.4112580032. The cubic root of 2028278339 is about 1265.8313602720.

The spelling of 2028278339 in words is "two billion, twenty-eight million, two hundred seventy-eight thousand, three hundred thirty-nine".