278942 has 8 divisors (see below), whose sum is σ = 421032. Its totient is φ = 138600.

The previous prime is 278917. The next prime is 278947. The reversal of 278942 is 249872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 278899 and 278908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278947) by changing a digit.

278942 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92 + ... + 752.

It is an arithmetic number, because the mean of its divisors is an integer number (52629).

2²⁷⁸⁹⁴² is an apocalyptic number.

278942 is a deficient number, since it is larger than the sum of its proper divisors (142090).

278942 is a wasteful number, since it uses less digits than its factorization.

278942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874.

The product of its digits is 8064, while the sum is 32.

The square root of 278942 is about 528.1496000188. The cubic root of 278942 is about 65.3388224829.

The spelling of 278942 in words is "two hundred seventy-eight thousand, nine hundred forty-two".