3861020 has 12 divisors (see below), whose sum is σ = 8108184. Its totient is φ = 1544400.

The previous prime is 3861017. The next prime is 3861041. The reversal of 3861020 is 201683.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 193051 = 3861020 / (3 + 8 + 6 + 1 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 3860983 and 3861001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96506 + ... + 96545.

It is an arithmetic number, because the mean of its divisors is an integer number (675682).

Almost surely, 2^3861020 is an apocalyptic number.

It is an amenable number.

3861020 is an abundant number, since it is smaller than the sum of its proper divisors (4247164).

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

3861020 is a wasteful number, since it uses less digits than its factorization.

3861020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193060 (or 193058 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 3861020 is about 1964.9478364578. The cubic root of 3861020 is about 156.8799168313.

The spelling of 3861020 in words is "three million, eight hundred sixty-one thousand, twenty".