3894220 has 48 divisors (see below), whose sum is σ = 9225216. Its totient is φ = 1368000.

The previous prime is 3894217. The next prime is 3894223. The reversal of 3894220 is 224983.

It is an interprime number because it is at equal distance from previous prime (3894217) and next prime (3894223).

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

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 15 ways as a sum of consecutive naturals, for example, 6535 + ... + 7105.

It is an arithmetic number, because the mean of its divisors is an integer number (192192).

Almost surely, 2^3894220 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 3894220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4612608).

3894220 is an abundant number, since it is smaller than the sum of its proper divisors (5330996).

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

3894220 is a wasteful number, since it uses less digits than its factorization.

3894220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3894220 is about 1973.3778148140. The cubic root of 3894220 is about 157.3282919161.

It can be divided in two parts, 3894 and 220, that added together give a palindrome (4114).

The spelling of 3894220 in words is "three million, eight hundred ninety-four thousand, two hundred twenty".