278562 has 16 divisors (see below), whose sum is σ = 590112. Its totient is φ = 87360.

The previous prime is 278561. The next prime is 278563. The reversal of 278562 is 265872.

It is an interprime number because it is at equal distance from previous prime (278561) and next prime (278563).

It is a d-powerful number, because it can be written as 2⁴ + 7² + 5⁶ + 8³ + 6³ + 2¹⁸ .

It is not an unprimeable number, because it can be changed into a prime (278561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1264 + ... + 1467.

It is an arithmetic number, because the mean of its divisors is an integer number (36882).

2²⁷⁸⁵⁶² is an apocalyptic number.

278562 is an abundant number, since it is smaller than the sum of its proper divisors (311550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278562 is a wasteful number, since it uses less digits than its factorization.

278562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753.

The product of its digits is 6720, while the sum is 30.

The square root of 278562 is about 527.7897308588. The cubic root of 278562 is about 65.3091388501.

The spelling of 278562 in words is "two hundred seventy-eight thousand, five hundred sixty-two".