3946394 has 4 divisors (see below), whose sum is σ = 5919594. Its totient is φ = 1973196.

The previous prime is 3946391. The next prime is 3946399. The reversal of 3946394 is 4936493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4936493 = 67 ⋅73679.

It can be written as a sum of positive squares in only one way, i.e., 3853369 + 93025 = 1963^2 + 305^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3946391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986597 + ... + 986600.

Almost surely, 2^3946394 is an apocalyptic number.

3946394 is a deficient number, since it is larger than the sum of its proper divisors (1973200).

3946394 is a wasteful number, since it uses less digits than its factorization.

3946394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973199.

The product of its digits is 69984, while the sum is 38.

The square root of 3946394 is about 1986.5532965415. The cubic root of 3946394 is about 158.0277951421.

Subtracting 3946394 from its reverse (4936493), we obtain a palindrome (990099).

The spelling of 3946394 in words is "three million, nine hundred forty-six thousand, three hundred ninety-four".