278068293 has 6 divisors (see below), whose sum is σ = 401654214. Its totient is φ = 185378856.

The previous prime is 278068247. The next prime is 278068313. The reversal of 278068293 is 392860872.

It can be written as a sum of positive squares in only one way, i.e., 263802564 + 14265729 = 16242^2 + 3777^2 .

It is not a de Polignac number, because 278068293 - 2¹⁸ = 277806149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278068213) 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 in 5 ways as a sum of consecutive naturals, for example, 15448230 + ... + 15448247.

It is an arithmetic number, because the mean of its divisors is an integer number (66942369).

Almost surely, 2^278068293 is an apocalyptic number.

It is an amenable number.

278068293 is a deficient number, since it is larger than the sum of its proper divisors (123585921).

278068293 is a wasteful number, since it uses less digits than its factorization.

278068293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30896483 (or 30896480 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 278068293 is about 16675.3798457486. The cubic root of 278068293 is about 652.7053266707.

The spelling of 278068293 in words is "two hundred seventy-eight million, sixty-eight thousand, two hundred ninety-three".