3847869 has 6 divisors (see below), whose sum is σ = 5558046. Its totient is φ = 2565240.

The previous prime is 3847867. The next prime is 3847871. The reversal of 3847869 is 9687483.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3847867) and next prime (3847871).

It can be written as a sum of positive squares in only one way, i.e., 3802500 + 45369 = 1950^2 + 213^2 .

It is not a de Polignac number, because 3847869 - 2¹ = 3847867 is a prime.

It is a super-2 number, since 2×3847869² = 29612191682322, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3847867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213762 + ... + 213779.

It is an arithmetic number, because the mean of its divisors is an integer number (926341).

Almost surely, 2^3847869 is an apocalyptic number.

It is an amenable number.

3847869 is a deficient number, since it is larger than the sum of its proper divisors (1710177).

3847869 is a wasteful number, since it uses less digits than its factorization.

3847869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427547 (or 427544 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 3847869 is about 1961.5985827890. The cubic root of 3847869 is about 156.7015982668.

The spelling of 3847869 in words is "three million, eight hundred forty-seven thousand, eight hundred sixty-nine".