278424855 has 12 divisors (see below), whose sum is σ = 482603160. Its totient is φ = 148493232.

The previous prime is 278424833. The next prime is 278424859. The reversal of 278424855 is 558424872.

It is not a de Polignac number, because 278424855 - 2¹⁵ = 278392087 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 6187219 = 278424855 / (2 + 7 + 8 + 4 + 2 + 4 + 8 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 278424855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278424859) 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 11 ways as a sum of consecutive naturals, for example, 3093565 + ... + 3093654.

It is an arithmetic number, because the mean of its divisors is an integer number (40216930).

Almost surely, 2^278424855 is an apocalyptic number.

278424855 is a deficient number, since it is larger than the sum of its proper divisors (204178305).

278424855 is a wasteful number, since it uses less digits than its factorization.

278424855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6187230 (or 6187227 counting only the distinct ones).

The product of its digits is 716800, while the sum is 45.

The square root of 278424855 is about 16686.0676913406. The cubic root of 278424855 is about 652.9841916333.

The spelling of 278424855 in words is "two hundred seventy-eight million, four hundred twenty-four thousand, eight hundred fifty-five".