3860220 has 144 divisors (see below), whose sum is σ = 13674528. Its totient is φ = 806400.

The previous prime is 3860209. The next prime is 3860221. The reversal of 3860220 is 220683.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3860221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38170 + ... + 38270.

It is an arithmetic number, because the mean of its divisors is an integer number (94962).

Almost surely, 2^3860220 is an apocalyptic number.

3860220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3860220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6837264).

3860220 is an abundant number, since it is smaller than the sum of its proper divisors (9814308).

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

3860220 is a wasteful number, since it uses less digits than its factorization.

3860220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3860220 is about 1964.7442581670. The cubic root of 3860220 is about 156.8690809553.

The spelling of 3860220 in words is "three million, eight hundred sixty thousand, two hundred twenty".