278056 has 8 divisors (see below), whose sum is σ = 521370. Its totient is φ = 139024.

The previous prime is 278051. The next prime is 278063. The reversal of 278056 is 650872.

It can be written as a sum of positive squares in only one way, i.e., 260100 + 17956 = 510^2 + 134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2¹⁸ + 7 + 0 + 8² + 5⁶ + 6³ .

It is not an unprimeable number, because it can be changed into a prime (278051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17371 + ... + 17386.

2²⁷⁸⁰⁵⁶ is an apocalyptic number.

278056 is the 334-th centered pentagonal number.

It is an amenable number.

278056 is a deficient number, since it is larger than the sum of its proper divisors (243314).

278056 is a wasteful number, since it uses less digits than its factorization.

278056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34763 (or 34759 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 278056 is about 527.3101554114. The cubic root of 278056 is about 65.2695708140.

Subtracting 278056 from its reverse (650872), we obtain a triangular number (372816 = T₈₆₃).

The spelling of 278056 in words is "two hundred seventy-eight thousand, fifty-six".