3946869 has 18 divisors (see below), whose sum is σ = 5966870. Its totient is φ = 2513808.

The previous prime is 3946853. The next prime is 3946879. The reversal of 3946869 is 9686493.

It can be written as a sum of positive squares in only one way, i.e., 3470769 + 476100 = 1863^2 + 690^2 .

It is not a de Polignac number, because 3946869 - 2⁴ = 3946853 is a prime.

It is a super-2 number, since 2×3946869² = 31155549806322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946829) 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 17 ways as a sum of consecutive naturals, for example, 4347 + ... + 5175.

Almost surely, 2^3946869 is an apocalyptic number.

It is an amenable number.

3946869 is a deficient number, since it is larger than the sum of its proper divisors (2020001).

3946869 is a wasteful number, since it uses less digits than its factorization.

3946869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881 (or 855 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 3946869 is about 1986.6728467465. The cubic root of 3946869 is about 158.0341351233.

The spelling of 3946869 in words is "three million, nine hundred forty-six thousand, eight hundred sixty-nine".