4000394 has 8 divisors (see below), whose sum is σ = 6009120. Its totient is φ = 1997356.

The previous prime is 4000379. The next prime is 4000439. The reversal of 4000394 is 4930004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787 + ... + 3345.

It is an arithmetic number, because the mean of its divisors is an integer number (751140).

Almost surely, 2^4000394 is an apocalyptic number.

4000394 is a deficient number, since it is larger than the sum of its proper divisors (2008726).

4000394 is a wasteful number, since it uses less digits than its factorization.

4000394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 4000394 is about 2000.0984975746. The cubic root of 4000394 is about 158.7453169925.

Adding to 4000394 its reverse (4930004), we get a palindrome (8930398).

The spelling of 4000394 in words is "four million, three hundred ninety-four", and thus it is an aban number.