278342 has 8 divisors (see below), whose sum is σ = 432000. Its totient is φ = 134344.

The previous prime is 278329. The next prime is 278347. The reversal of 278342 is 243872.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342 + ... + 2457.

It is an arithmetic number, because the mean of its divisors is an integer number (54000).

2²⁷⁸³⁴² is an apocalyptic number.

278342 is a deficient number, since it is larger than the sum of its proper divisors (153658).

278342 is a wasteful number, since it uses less digits than its factorization.

278342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830.

The product of its digits is 2688, while the sum is 26.

The square root of 278342 is about 527.5812733598. The cubic root of 278342 is about 65.2919412487.

It can be divided in two parts, 2783 and 42, that multiplied together give a triangular number (116886 = T₄₈₃).

The spelling of 278342 in words is "two hundred seventy-eight thousand, three hundred forty-two".