3809844 has 18 divisors (see below), whose sum is σ = 9630530. Its totient is φ = 1269936.

The previous prime is 3809837. The next prime is 3809849. The reversal of 3809844 is 4489083.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 1468944 = 1530^2 + 1212^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×3809844² = 29029822608672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 105829 = 3809844 / (3 + 8 + 0 + 9 + 8 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 3809799 and 3809808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3809849) 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, 52879 + ... + 52950.

Almost surely, 2^3809844 is an apocalyptic number.

It is an amenable number.

3809844 is an abundant number, since it is smaller than the sum of its proper divisors (5820686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3809844 is a wasteful number, since it uses less digits than its factorization.

3809844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105839 (or 105834 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 3809844 is about 1951.8821685747. The cubic root of 3809844 is about 156.1837086255.

The spelling of 3809844 in words is "three million, eight hundred nine thousand, eight hundred forty-four".