4000844 has 6 divisors (see below), whose sum is σ = 7001484. Its totient is φ = 2000420.

The previous prime is 4000823. The next prime is 4000853. The reversal of 4000844 is 4480004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500102 + ... + 500109.

It is an arithmetic number, because the mean of its divisors is an integer number (1166914).

Almost surely, 2^4000844 is an apocalyptic number.

It is an amenable number.

4000844 is a deficient number, since it is larger than the sum of its proper divisors (3000640).

4000844 is a wasteful number, since it uses less digits than its factorization.

4000844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000215 (or 1000213 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 4000844 is about 2000.2109888709. The cubic root of 4000844 is about 158.7512691324.

Adding to 4000844 its reverse (4480004), we get a palindrome (8480848).

The spelling of 4000844 in words is "four million, eight hundred forty-four", and thus it is an aban number.