3936820 has 24 divisors (see below), whose sum is σ = 8470728. Its totient is φ = 1536000.

The previous prime is 3936811. The next prime is 3936827. The reversal of 3936820 is 286393.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24336 + 3912484 = 156^2 + 1978^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3936827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581 + ... + 3220.

It is an arithmetic number, because the mean of its divisors is an integer number (352947).

Almost surely, 2^3936820 is an apocalyptic number.

It is an amenable number.

3936820 is an abundant number, since it is smaller than the sum of its proper divisors (4533908).

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

3936820 is a wasteful number, since it uses less digits than its factorization.

3936820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4851 (or 4849 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 3936820 is about 1984.1421320057. The cubic root of 3936820 is about 157.8998992074.

The spelling of 3936820 in words is "three million, nine hundred thirty-six thousand, eight hundred twenty".