3866481 has 16 divisors (see below), whose sum is σ = 6030400. Its totient is φ = 2441664.

The previous prime is 3866479. The next prime is 3866543. The reversal of 3866481 is 1846683.

It is a happy number.

3866481 is a `hidden beast` number, since 3 + 8 + 6 + 648 + 1 = 666.

3866481 is nontrivially palindromic in base 8.

It is not a de Polignac number, because 3866481 - 2¹ = 3866479 is a prime.

It is a super-2 number, since 2×3866481² = 29899350646722, which contains 22 as substring.

It is a Duffinian number.

3866481 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3866441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3256 + ... + 4281.

It is an arithmetic number, because the mean of its divisors is an integer number (376900).

Almost surely, 2^3866481 is an apocalyptic number.

It is an amenable number.

3866481 is a deficient number, since it is larger than the sum of its proper divisors (2163919).

3866481 is a wasteful number, since it uses less digits than its factorization.

3866481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7565 (or 7559 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 3866481 is about 1966.3369497622. The cubic root of 3866481 is about 156.9538452777.

The spelling of 3866481 in words is "three million, eight hundred sixty-six thousand, four hundred eighty-one".