3866831 has 8 divisors (see below), whose sum is σ = 4086720. Its totient is φ = 3652768.

The previous prime is 3866809. The next prime is 3866839. The reversal of 3866831 is 1386683.

It is a happy number.

3866831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3866831 - 2⁶ = 3866767 is a prime.

It is a super-2 number, since 2×3866831² = 29904763965122, 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 = 3866791 and 3866800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56 + ... + 2781.

It is an arithmetic number, because the mean of its divisors is an integer number (510840).

Almost surely, 2^3866831 is an apocalyptic number.

3866831 is a deficient number, since it is larger than the sum of its proper divisors (219889).

3866831 is a wasteful number, since it uses less digits than its factorization.

3866831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913.

The product of its digits is 20736, while the sum is 35.

The square root of 3866831 is about 1966.4259457198. The cubic root of 3866831 is about 156.9585810385.

The spelling of 3866831 in words is "three million, eight hundred sixty-six thousand, eight hundred thirty-one".