3828820 has 12 divisors (see below), whose sum is σ = 8040564. Its totient is φ = 1531520.

The previous prime is 3828751. The next prime is 3828821. The reversal of 3828820 is 288283.

3828820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2226064 + 1602756 = 1492^2 + 1266^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3828821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95701 + ... + 95740.

It is an arithmetic number, because the mean of its divisors is an integer number (670047).

Almost surely, 2^3828820 is an apocalyptic number.

It is an amenable number.

3828820 is an abundant number, since it is smaller than the sum of its proper divisors (4211744).

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

3828820 is a wasteful number, since it uses less digits than its factorization.

3828820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191450 (or 191448 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 3828820 is about 1956.7370799369. The cubic root of 3828820 is about 156.4425849332.

The spelling of 3828820 in words is "three million, eight hundred twenty-eight thousand, eight hundred twenty".