3960820 has 24 divisors (see below), whose sum is σ = 8605800. Its totient is φ = 1529472.

The previous prime is 3960811. The next prime is 3960829. The reversal of 3960820 is 280693.

It is an interprime number because it is at equal distance from previous prime (3960811) and next prime (3960829).

It can be written as a sum of positive squares in 4 ways, for example, as 478864 + 3481956 = 692^2 + 1866^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3960829) 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, 2835 + ... + 3994.

It is an arithmetic number, because the mean of its divisors is an integer number (358575).

Almost surely, 2^3960820 is an apocalyptic number.

It is an amenable number.

3960820 is an abundant number, since it is smaller than the sum of its proper divisors (4644980).

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

3960820 is a wasteful number, since it uses less digits than its factorization.

3960820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6867 (or 6865 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 3960820 is about 1990.1808963006. The cubic root of 3960820 is about 158.2201172791.

The spelling of 3960820 in words is "three million, nine hundred sixty thousand, eight hundred twenty".