3681228 has 48 divisors (see below), whose sum is σ = 8999424. Its totient is φ = 1170240.

The previous prime is 3681217. The next prime is 3681239. The reversal of 3681228 is 8221863.

3681228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3681217) and next prime (3681239).

It is a junction number, because it is equal to n+sod(n) for n = 3681195 and 3681204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34351 + ... + 34457.

It is an arithmetic number, because the mean of its divisors is an integer number (187488).

Almost surely, 2^3681228 is an apocalyptic number.

It is an amenable number.

3681228 is an abundant number, since it is smaller than the sum of its proper divisors (5318196).

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

3681228 is a wasteful number, since it uses less digits than its factorization.

3681228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 220 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 3681228 is about 1918.6526522537. The cubic root of 3681228 is about 154.4060236404.

It can be divided in two parts, 368 and 1228, that added together give a triangular number (1596 = T₅₆).

The spelling of 3681228 in words is "three million, six hundred eighty-one thousand, two hundred twenty-eight".