3981604 has 24 divisors (see below), whose sum is σ = 8049888. Its totient is φ = 1703040.

The previous prime is 3981589. The next prime is 3981617. The reversal of 3981604 is 4061893.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1914 + ... + 3409.

It is an arithmetic number, because the mean of its divisors is an integer number (335412).

Almost surely, 2^3981604 is an apocalyptic number.

3981604 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

3981604 is an abundant number, since it is smaller than the sum of its proper divisors (4068284).

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

3981604 is a wasteful number, since it uses less digits than its factorization.

3981604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355 (or 5353 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 3981604 is about 1995.3957001056. The cubic root of 3981604 is about 158.4963826061.

It can be divided in two parts, 398 and 1604, that added together give a palindrome (2002).

The spelling of 3981604 in words is "three million, nine hundred eighty-one thousand, six hundred four".