3909406 has 8 divisors (see below), whose sum is σ = 5879304. Its totient is φ = 1949640.

The previous prime is 3909401. The next prime is 3909427. The reversal of 3909406 is 6049093.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1480 + ... + 3163.

It is an arithmetic number, because the mean of its divisors is an integer number (734913).

Almost surely, 2^3909406 is an apocalyptic number.

3909406 is a deficient number, since it is larger than the sum of its proper divisors (1969898).

3909406 is a wasteful number, since it uses less digits than its factorization.

3909406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 3909406 is about 1977.2217882676. The cubic root of 3909406 is about 157.5325338016.

The spelling of 3909406 in words is "three million, nine hundred nine thousand, four hundred six".