394240 has 88 divisors (see below), whose sum is σ = 1179072. Its totient is φ = 122880.

The previous prime is 394223. The next prime is 394241. The reversal of 394240 is 42493.

It is a tau number, because it is divible by the number of its divisors (88).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (394241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35835 + ... + 35845.

2³⁹⁴²⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (589536).

394240 is an abundant number, since it is smaller than the sum of its proper divisors (784832).

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

394240 is a wasteful number, since it uses less digits than its factorization.

394240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43 (or 25 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 394240 is about 627.8853398512. The cubic root of 394240 is about 73.3252516346.

The spelling of 394240 in words is "three hundred ninety-four thousand, two hundred forty".