3857843 has 6 divisors (see below), whose sum is σ = 4240572. Its totient is φ = 3507020.

The previous prime is 3857839. The next prime is 3857863. The reversal of 3857843 is 3487583.

It is a happy number.

It is not a de Polignac number, because 3857843 - 2² = 3857839 is a prime.

It is a super-2 number, since 2×3857843² = 29765905225298, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3857797 and 3857806.

It is not an unprimeable number, because it can be changed into a prime (3857803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15821 + ... + 16062.

It is an arithmetic number, because the mean of its divisors is an integer number (706762).

Almost surely, 2^3857843 is an apocalyptic number.

3857843 is a deficient number, since it is larger than the sum of its proper divisors (382729).

3857843 is a wasteful number, since it uses less digits than its factorization.

3857843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31905 (or 31894 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 3857843 is about 1964.1392516825. The cubic root of 3857843 is about 156.8368760233.

It can be divided in two parts, 385 and 7843, that added together give a palindrome (8228).

The spelling of 3857843 in words is "three million, eight hundred fifty-seven thousand, eight hundred forty-three".