3138409 has 8 divisors (see below), whose sum is σ = 3352320. Its totient is φ = 2931600.

The previous prime is 3138403. The next prime is 3138449. The reversal of 3138409 is 9048313.

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 3138409 - 2¹¹ = 3136361 is a prime.

It is a super-2 number, since 2×3138409² = 19699222102562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3138403) 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, 847 + ... + 2644.

It is an arithmetic number, because the mean of its divisors is an integer number (419040).

Almost surely, 2^3138409 is an apocalyptic number.

It is an amenable number.

3138409 is a deficient number, since it is larger than the sum of its proper divisors (213911).

3138409 is a wasteful number, since it uses less digits than its factorization.

3138409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3551.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 3138409 is about 1771.5555311646. Note that the first 4 decimals coincide. The cubic root of 3138409 is about 146.4096986866.

The spelling of 3138409 in words is "three million, one hundred thirty-eight thousand, four hundred nine".