3983805 has 24 divisors (see below), whose sum is σ = 7892352. Its totient is φ = 1821024.

The previous prime is 3983789. The next prime is 3983809. The reversal of 3983805 is 5083893.

It is not a de Polignac number, because 3983805 - 2⁴ = 3983789 is a prime.

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 3983805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3983809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6009 + ... + 6638.

It is an arithmetic number, because the mean of its divisors is an integer number (328848).

Almost surely, 2^3983805 is an apocalyptic number.

3983805 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3983805 is a deficient number, since it is larger than the sum of its proper divisors (3908547).

3983805 is a wasteful number, since it uses less digits than its factorization.

3983805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12665 (or 12662 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 3983805 is about 1995.9471435887. The cubic root of 3983805 is about 158.5255824191.

The spelling of 3983805 in words is "three million, nine hundred eighty-three thousand, eight hundred five".