3904220 has 24 divisors (see below), whose sum is σ = 8681904. Its totient is φ = 1469696.

The previous prime is 3904217. The next prime is 3904249. The reversal of 3904220 is 224093.

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 = 3904192 and 3904201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5402 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (361746).

Almost surely, 2^3904220 is an apocalyptic number.

It is an amenable number.

3904220 is an abundant number, since it is smaller than the sum of its proper divisors (4777684).

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

3904220 is a wasteful number, since it uses less digits than its factorization.

3904220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11509 (or 11507 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3904220 is about 1975.9099169750. The cubic root of 3904220 is about 157.4628450191.

The spelling of 3904220 in words is "three million, nine hundred four thousand, two hundred twenty".