3138866 has 8 divisors (see below), whose sum is σ = 4715820. Its totient is φ = 1566928.

The previous prime is 3138853. The next prime is 3138869. The reversal of 3138866 is 6688313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2627641 + 511225 = 1621^2 + 715^2 .

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

It is not an unprimeable number, because it can be changed into a prime (3138869) 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 3 ways as a sum of consecutive naturals, for example, 1820 + ... + 3096.

Almost surely, 2^3138866 is an apocalyptic number.

3138866 is a deficient number, since it is larger than the sum of its proper divisors (1576954).

3138866 is a wasteful number, since it uses less digits than its factorization.

3138866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508.

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

The square root of 3138866 is about 1771.6845091607. The cubic root of 3138866 is about 146.4168048334.

It can be divided in two parts, 3138 and 866, that added together give a palindrome (4004).

The spelling of 3138866 in words is "three million, one hundred thirty-eight thousand, eight hundred sixty-six".