3906427 has 10 divisors (see below), whose sum is σ = 4560028. Its totient is φ = 3346308.

The previous prime is 3906407. The next prime is 3906431. The reversal of 3906427 is 7246093.

It is not a de Polignac number, because 3906427 - 2¹¹ = 3904379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3906407) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1588 + ... + 3214.

Almost surely, 2^3906427 is an apocalyptic number.

3906427 is a deficient number, since it is larger than the sum of its proper divisors (653601).

3906427 is an frugal number, since it uses more digits than its factorization.

3906427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 3906427 is about 1976.4683149497. The cubic root of 3906427 is about 157.4925099319.

The spelling of 3906427 in words is "three million, nine hundred six thousand, four hundred twenty-seven".