3945406 has 8 divisors (see below), whose sum is σ = 5929200. Its totient is φ = 1969008.

The previous prime is 3945391. The next prime is 3945413. The reversal of 3945406 is 6045493.

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

It is a congruent 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, 231 + ... + 2818.

It is an arithmetic number, because the mean of its divisors is an integer number (741150).

Almost surely, 2^3945406 is an apocalyptic number.

3945406 is a deficient number, since it is larger than the sum of its proper divisors (1983794).

3945406 is a wasteful number, since it uses less digits than its factorization.

3945406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 3945406 is about 1986.3046090668. The cubic root of 3945406 is about 158.0146063514.

The spelling of 3945406 in words is "three million, nine hundred forty-five thousand, four hundred six".