3920228 has 12 divisors (see below), whose sum is σ = 7388220. Its totient is φ = 1809312.

The previous prime is 3920227. The next prime is 3920233. The reversal of 3920228 is 8220293.

It can be written as a sum of positive squares in 2 ways, for example, as 708964 + 3211264 = 842^2 + 1792^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 3920197 and 3920206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37643 + ... + 37746.

It is an arithmetic number, because the mean of its divisors is an integer number (615685).

Almost surely, 2^3920228 is an apocalyptic number.

It is an amenable number.

3920228 is a deficient number, since it is larger than the sum of its proper divisors (3467992).

3920228 is a wasteful number, since it uses less digits than its factorization.

3920228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75406 (or 75404 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 3920228 is about 1979.9565651802. The cubic root of 3920228 is about 157.6777601614.

The spelling of 3920228 in words is "three million, nine hundred twenty thousand, two hundred twenty-eight".