3857409 has 8 divisors (see below), whose sum is σ = 5714720. Its totient is φ = 2571588.

The previous prime is 3857383. The next prime is 3857417. The reversal of 3857409 is 9047583.

It is not a de Polignac number, because 3857409 - 2⁸ = 3857153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3857429) 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, 71407 + ... + 71460.

It is an arithmetic number, because the mean of its divisors is an integer number (714340).

Almost surely, 2^3857409 is an apocalyptic number.

It is an amenable number.

3857409 is a deficient number, since it is larger than the sum of its proper divisors (1857311).

3857409 is a wasteful number, since it uses less digits than its factorization.

3857409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142876 (or 142870 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 3857409 is about 1964.0287676101. The cubic root of 3857409 is about 156.8309945194.

The spelling of 3857409 in words is "three million, eight hundred fifty-seven thousand, four hundred nine".