278846 has 4 divisors (see below), whose sum is σ = 418272. Its totient is φ = 139422.

The previous prime is 278843. The next prime is 278849. The reversal of 278846 is 648872.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (278843) and next prime (278849).

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 278846.

It is not an unprimeable number, because it can be changed into a prime (278843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69710 + ... + 69713.

It is an arithmetic number, because the mean of its divisors is an integer number (104568).

2²⁷⁸⁸⁴⁶ is an apocalyptic number.

278846 is a deficient number, since it is larger than the sum of its proper divisors (139426).

278846 is a wasteful number, since it uses less digits than its factorization.

278846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139425.

The product of its digits is 21504, while the sum is 35.

The square root of 278846 is about 528.0587088573. The cubic root of 278846 is about 65.3313260062.

The spelling of 278846 in words is "two hundred seventy-eight thousand, eight hundred forty-six".