278670855 has 16 divisors (see below), whose sum is σ = 447575040. Its totient is φ = 148057248.

The previous prime is 278670839. The next prime is 278670859. The reversal of 278670855 is 558076872.

It is not a de Polignac number, because 278670855 - 2⁴ = 278670839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278670859) 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, 31375 + ... + 39264.

It is an arithmetic number, because the mean of its divisors is an integer number (27973440).

Almost surely, 2^278670855 is an apocalyptic number.

278670855 is a deficient number, since it is larger than the sum of its proper divisors (168904185).

278670855 is a wasteful number, since it uses less digits than its factorization.

278670855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70910.

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 278670855 is about 16693.4374830351. The cubic root of 278670855 is about 653.1764479668.

The spelling of 278670855 in words is "two hundred seventy-eight million, six hundred seventy thousand, eight hundred fifty-five".