3870020 has 72 divisors (see below), whose sum is σ = 10342080. Its totient is φ = 1202880.

The previous prime is 3870011. The next prime is 3870037. The reversal of 3870020 is 200783.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3869974 and 3870001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10601 + ... + 10959.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

Almost surely, 2^3870020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3870020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5171040).

3870020 is an abundant number, since it is smaller than the sum of its proper divisors (6472060).

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

3870020 is a wasteful number, since it uses less digits than its factorization.

3870020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 3870020 is about 1967.2366405697. The cubic root of 3870020 is about 157.0017174275.

The spelling of 3870020 in words is "three million, eight hundred seventy thousand, twenty".