3930409 has 8 divisors (see below), whose sum is σ = 4511808. Its totient is φ = 3354000.

The previous prime is 3930391. The next prime is 3930439. The reversal of 3930409 is 9040393.

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

It is a cyclic number.

It is not a de Polignac number, because 3930409 - 2¹¹ = 3928361 is a prime.

It is a super-2 number, since 2×3930409² = 30896229814562, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3930439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639 + ... + 2875.

It is an arithmetic number, because the mean of its divisors is an integer number (563976).

Almost surely, 2^3930409 is an apocalyptic number.

It is an amenable number.

3930409 is a deficient number, since it is larger than the sum of its proper divisors (581399).

3930409 is a wasteful number, since it uses less digits than its factorization.

3930409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 3930409 is about 1982.5259140803. The cubic root of 3930409 is about 157.8141407992.

The spelling of 3930409 in words is "three million, nine hundred thirty thousand, four hundred nine".