3840220 has 24 divisors (see below), whose sum is σ = 8122464. Its totient is φ = 1525056.

The previous prime is 3840211. The next prime is 3840227. The reversal of 3840220 is 220483.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840227) 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, 2529 + ... + 3751.

It is an arithmetic number, because the mean of its divisors is an integer number (338436).

Almost surely, 2^3840220 is an apocalyptic number.

It is an amenable number.

3840220 is an abundant number, since it is smaller than the sum of its proper divisors (4282244).

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

3840220 is a wasteful number, since it uses less digits than its factorization.

3840220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 3840220 is about 1959.6479275625. The cubic root of 3840220 is about 156.5976961135.

The spelling of 3840220 in words is "three million, eight hundred forty thousand, two hundred twenty".