278855343 has 24 divisors (see below), whose sum is σ = 456608880. Its totient is φ = 162570240.

The previous prime is 278855341. The next prime is 278855359. The reversal of 278855343 is 343558872.

It is not a de Polignac number, because 278855343 - 2¹ = 278855341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278855341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60498 + ... + 64943.

It is an arithmetic number, because the mean of its divisors is an integer number (19025370).

Almost surely, 2^278855343 is an apocalyptic number.

278855343 is a deficient number, since it is larger than the sum of its proper divisors (177753537).

278855343 is a wasteful number, since it uses less digits than its factorization.

278855343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125479 (or 125476 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 278855343 is about 16698.9623330314. The cubic root of 278855343 is about 653.3205566072.

The spelling of 278855343 in words is "two hundred seventy-eight million, eight hundred fifty-five thousand, three hundred forty-three".