278870 has 16 divisors (see below), whose sum is σ = 509760. Its totient is φ = 109824.

The previous prime is 278867. The next prime is 278879. The reversal of 278870 is 78872.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 278870.

It is not an unprimeable number, because it can be changed into a prime (278879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614 + ... + 966.

It is an arithmetic number, because the mean of its divisors is an integer number (31860).

2²⁷⁸⁸⁷⁰ is an apocalyptic number.

278870 is a deficient number, since it is larger than the sum of its proper divisors (230890).

278870 is a wasteful number, since it uses less digits than its factorization.

278870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 278870 is about 528.0814331142. The cubic root of 278870 is about 65.3332002866. Note that the first 3 decimals are identical.

It can be divided in two parts, 278 and 870, that multiplied together give a triangular number (241860 = T₆₉₅).

The spelling of 278870 in words is "two hundred seventy-eight thousand, eight hundred seventy".