278000855 has 16 divisors (see below), whose sum is σ = 369059328. Its totient is φ = 199332000.

The previous prime is 278000831. The next prime is 278000857. The reversal of 278000855 is 558000872.

It is not a de Polignac number, because 278000855 - 2⁶ = 278000791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278000857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31691 + ... + 39500.

It is an arithmetic number, because the mean of its divisors is an integer number (23066208).

Almost surely, 2^278000855 is an apocalyptic number.

278000855 is a deficient number, since it is larger than the sum of its proper divisors (91058473).

278000855 is a wasteful number, since it uses less digits than its factorization.

278000855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71278.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 278000855 is about 16673.3576402595. The cubic root of 278000855 is about 652.6525570193.

The spelling of 278000855 in words is "two hundred seventy-eight million, eight hundred fifty-five", and thus it is an aban number.