3821864 has 16 divisors (see below), whose sum is σ = 7477920. Its totient is φ = 1827760.

The previous prime is 3821863. The next prime is 3821893. The reversal of 3821864 is 4681283.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3821864.

It is not an unprimeable number, because it can be changed into a prime (3821863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10202 + ... + 10569.

It is an arithmetic number, because the mean of its divisors is an integer number (467370).

Almost surely, 2^3821864 is an apocalyptic number.

It is an amenable number.

3821864 is a deficient number, since it is larger than the sum of its proper divisors (3656056).

3821864 is a wasteful number, since it uses less digits than its factorization.

3821864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20800 (or 20796 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 3821864 is about 1954.9588230958. The cubic root of 3821864 is about 156.3477885999.

The spelling of 3821864 in words is "three million, eight hundred twenty-one thousand, eight hundred sixty-four".