394280 has 16 divisors (see below), whose sum is σ = 887220. Its totient is φ = 157696.

The previous prime is 394271. The next prime is 394291. The reversal of 394280 is 82493.

It can be written as a sum of positive squares in 2 ways, for example, as 386884 + 7396 = 622^2 + 86^2 .

It is an unprimeable number.

394280 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4889 + ... + 4968.

2³⁹⁴²⁸⁰ is an apocalyptic number.

It is an amenable number.

394280 is an abundant number, since it is smaller than the sum of its proper divisors (492940).

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

394280 is a wasteful number, since it uses less digits than its factorization.

394280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9868 (or 9864 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 394280 is about 627.9171919927. The cubic root of 394280 is about 73.3277314362.

The spelling of 394280 in words is "three hundred ninety-four thousand, two hundred eighty".