3885820 has 24 divisors (see below), whose sum is σ = 8248464. Its totient is φ = 1537536.

The previous prime is 3885803. The next prime is 3885821. The reversal of 3885820 is 285883.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3885821) 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, 939 + ... + 2941.

It is an arithmetic number, because the mean of its divisors is an integer number (343686).

Almost surely, 2^3885820 is an apocalyptic number.

It is an amenable number.

3885820 is an abundant number, since it is smaller than the sum of its proper divisors (4362644).

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

3885820 is a wasteful number, since it uses less digits than its factorization.

3885820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109 (or 2107 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 3885820 is about 1971.2483354463. The cubic root of 3885820 is about 157.2150891856.

It can be divided in two parts, 38 and 85820, that added together give a palindrome (85858).

The spelling of 3885820 in words is "three million, eight hundred eighty-five thousand, eight hundred twenty".