278128 has 10 divisors (see below), whose sum is σ = 538904. Its totient is φ = 139056.

The previous prime is 278123. The next prime is 278143. The reversal of 278128 is 821872.

It is a junction number, because it is equal to n+sod(n) for n = 278096 and 278105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8676 + ... + 8707.

2²⁷⁸¹²⁸ is an apocalyptic number.

It is an amenable number.

278128 is a deficient number, since it is larger than the sum of its proper divisors (260776).

278128 is a wasteful number, since it uses less digits than its factorization.

278128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17391 (or 17385 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 278128 is about 527.3784220083. The cubic root of 278128 is about 65.2752039761.

It can be divided in two parts, 2781 and 28, that added together give a square (2809 = 53²).

The spelling of 278128 in words is "two hundred seventy-eight thousand, one hundred twenty-eight".