3988224 has 72 divisors (see below), whose sum is σ = 11814320. Its totient is φ = 1327104.

The previous prime is 3988213. The next prime is 3988247. The reversal of 3988224 is 4228893.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6624 + ... + 7200.

Almost surely, 2^3988224 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 3988224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5907160).

3988224 is an abundant number, since it is smaller than the sum of its proper divisors (7826096).

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

3988224 is an equidigital number, since it uses as much as digits as its factorization.

3988224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 582 counting only the distinct ones).

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

The square root of 3988224 is about 1997.0538300206. The cubic root of 3988224 is about 158.5841751206.

The spelling of 3988224 in words is "three million, nine hundred eighty-eight thousand, two hundred twenty-four".