4031866 has 4 divisors (see below), whose sum is σ = 6047802. Its totient is φ = 2015932.

The previous prime is 4031861. The next prime is 4031879. The reversal of 4031866 is 6681304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2627641 + 1404225 = 1621^2 + 1185^2 .

It is not an unprimeable number, because it can be changed into a prime (4031861) 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 as a sum of consecutive naturals, namely, 1007965 + ... + 1007968.

Almost surely, 2^4031866 is an apocalyptic number.

4031866 is a deficient number, since it is larger than the sum of its proper divisors (2015936).

4031866 is a wasteful number, since it uses less digits than its factorization.

4031866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015935.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 4031866 is about 2007.9506966059. The cubic root of 4031866 is about 159.1605250898.

The spelling of 4031866 in words is "four million, thirty-one thousand, eight hundred sixty-six".