3843945 has 24 divisors (see below), whose sum is σ = 7615296. Its totient is φ = 1757088.

The previous prime is 3843943. The next prime is 3843971. The reversal of 3843945 is 5493483.

It is not a de Polignac number, because 3843945 - 2¹ = 3843943 is a prime.

3843945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3843941) 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 23 ways as a sum of consecutive naturals, for example, 5787 + ... + 6416.

It is an arithmetic number, because the mean of its divisors is an integer number (317304).

Almost surely, 2^3843945 is an apocalyptic number.

3843945 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3843945 is a deficient number, since it is larger than the sum of its proper divisors (3771351).

3843945 is a wasteful number, since it uses less digits than its factorization.

3843945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12221 (or 12218 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 3843945 is about 1960.5981230227. The cubic root of 3843945 is about 156.6483128240.

The spelling of 3843945 in words is "three million, eight hundred forty-three thousand, nine hundred forty-five".