3849891 has 4 divisors (see below), whose sum is σ = 5133192. Its totient is φ = 2566592.

The previous prime is 3849889. The next prime is 3849929. The reversal of 3849891 is 1989483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1989483 = 3 ⋅663161.

It is a cyclic number.

It is not a de Polignac number, because 3849891 - 2¹ = 3849889 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3849821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641646 + ... + 641651.

It is an arithmetic number, because the mean of its divisors is an integer number (1283298).

Almost surely, 2^3849891 is an apocalyptic number.

3849891 is a deficient number, since it is larger than the sum of its proper divisors (1283301).

3849891 is a wasteful number, since it uses less digits than its factorization.

3849891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283300.

The product of its digits is 62208, while the sum is 42.

The square root of 3849891 is about 1962.1139110663. The cubic root of 3849891 is about 156.7290416082.

The spelling of 3849891 in words is "three million, eight hundred forty-nine thousand, eight hundred ninety-one".