3894228 has 72 divisors (see below), whose sum is σ = 10869768. Its totient is φ = 1168128.

The previous prime is 3894227. The next prime is 3894229. The reversal of 3894228 is 8224983.

It is an interprime number because it is at equal distance from previous prime (3894227) and next prime (3894229).

It can be written as a sum of positive squares in 4 ways, for example, as 161604 + 3732624 = 402^2 + 1932^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3894192 and 3894201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3894223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24726 + ... + 24882.

It is an arithmetic number, because the mean of its divisors is an integer number (150969).

Almost surely, 2^3894228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3894228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5434884).

3894228 is an abundant number, since it is smaller than the sum of its proper divisors (6975540).

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

3894228 is a wasteful number, since it uses less digits than its factorization.

3894228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 228 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 3894228 is about 1973.3798417943. The cubic root of 3894228 is about 157.3283996506.

The spelling of 3894228 in words is "three million, eight hundred ninety-four thousand, two hundred twenty-eight".