3856491 has 20 divisors (see below), whose sum is σ = 5889312. Its totient is φ = 2513808.

The previous prime is 3856477. The next prime is 3856499. The reversal of 3856491 is 1946583.

3856491 is a `hidden beast` number, since 3 + 8 + 5 + 649 + 1 = 666.

It is not a de Polignac number, because 3856491 - 2⁹ = 3855979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3856499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3301 + ... + 4313.

Almost surely, 2^3856491 is an apocalyptic number.

3856491 is a deficient number, since it is larger than the sum of its proper divisors (2032821).

3856491 is a wasteful number, since it uses less digits than its factorization.

3856491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1063 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 3856491 is about 1963.7950504062. The cubic root of 3856491 is about 156.8185524652.

The spelling of 3856491 in words is "three million, eight hundred fifty-six thousand, four hundred ninety-one".