278482 has 4 divisors (see below), whose sum is σ = 417726. Its totient is φ = 139240.

The previous prime is 278479. The next prime is 278489. The reversal of 278482 is 284872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 168921 + 109561 = 411^2 + 331^2 .

It is not an unprimeable number, because it can be changed into a prime (278489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69619 + ... + 69622.

2²⁷⁸⁴⁸² is an apocalyptic number.

278482 is a deficient number, since it is larger than the sum of its proper divisors (139244).

278482 is a wasteful number, since it uses less digits than its factorization.

278482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139243.

The product of its digits is 7168, while the sum is 31.

The square root of 278482 is about 527.7139376594. The cubic root of 278482 is about 65.3028862249.

It can be divided in two parts, 27848 and 2, that multiplied together give a square (55696 = 236²).

The spelling of 278482 in words is "two hundred seventy-eight thousand, four hundred eighty-two".