4389624 has 48 divisors (see below), whose sum is σ = 12186720. Its totient is φ = 1426560.

The previous prime is 4389611. The next prime is 4389647. The reversal of 4389624 is 4269834.

It is a happy number.

It is a super-2 number, since 2×4389624² = 38537597722752, which contains 22 as substring.

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 d-powerful number, because it can be written as 4⁷ + 3¹¹ + 8³ + 9³ + 6² + 2⁹ + 4¹¹ .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2209 + ... + 3695.

It is an arithmetic number, because the mean of its divisors is an integer number (253890).

Almost surely, 2^4389624 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 4389624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6093360).

4389624 is an abundant number, since it is smaller than the sum of its proper divisors (7797096).

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

4389624 is a wasteful number, since it uses less digits than its factorization.

4389624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540 (or 1533 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 4389624 is about 2095.1429545499. The cubic root of 4389624 is about 163.7353455021.

The spelling of 4389624 in words is "four million, three hundred eighty-nine thousand, six hundred twenty-four".