3930646 has 4 divisors (see below), whose sum is σ = 5895972. Its totient is φ = 1965322.

The previous prime is 3930637. The next prime is 3930653. The reversal of 3930646 is 6460393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6460393 = 157 ⋅41149.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982660 + ... + 982663.

It is an arithmetic number, because the mean of its divisors is an integer number (1473993).

Almost surely, 2^3930646 is an apocalyptic number.

3930646 is a deficient number, since it is larger than the sum of its proper divisors (1965326).

3930646 is a wasteful number, since it uses less digits than its factorization.

3930646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965325.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 3930646 is about 1982.5856854119. The cubic root of 3930646 is about 157.8173127507.

The spelling of 3930646 in words is "three million, nine hundred thirty thousand, six hundred forty-six".