3994401 has 8 divisors (see below), whose sum is σ = 5336640. Its totient is φ = 2657552.

The previous prime is 3994391. The next prime is 3994411. The reversal of 3994401 is 1044993.

It is an interprime number because it is at equal distance from previous prime (3994391) and next prime (3994411).

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

It is a cyclic number.

It is not a de Polignac number, because 3994401 - 2⁵ = 3994369 is a prime.

It is a Curzon number.

3994401 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3994411) 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, 940 + ... + 2978.

It is an arithmetic number, because the mean of its divisors is an integer number (667080).

Almost surely, 2^3994401 is an apocalyptic number.

It is an amenable number.

3994401 is a deficient number, since it is larger than the sum of its proper divisors (1342239).

3994401 is a wasteful number, since it uses less digits than its factorization.

3994401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 3994401 is about 1998.5997598319. The cubic root of 3994401 is about 158.6660051248. Note that the first 3 decimals are identical.

The spelling of 3994401 in words is "three million, nine hundred ninety-four thousand, four hundred one".