4002444520 has 16 divisors (see below), whose sum is σ = 9005500260. Its totient is φ = 1600977792.

The previous prime is 4002444517. The next prime is 4002444527. The reversal of 4002444520 is 254442004.

It is a happy number.

4002444520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3681819684 + 320624836 = 60678^2 + 17906^2 .

It is not an unprimeable number, because it can be changed into a prime (4002444527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50030517 + ... + 50030596.

Almost surely, 2^4002444520 is an apocalyptic number.

4002444520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4002444520 is an abundant number, since it is smaller than the sum of its proper divisors (5003055740).

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

4002444520 is a wasteful number, since it uses less digits than its factorization.

4002444520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100061124 (or 100061120 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 4002444520 is about 63264.8758791164. The cubic root of 4002444520 is about 1587.7243555853.

Adding to 4002444520 its reverse (254442004), we get a palindrome (4256886524).

The spelling of 4002444520 in words is "four billion, two million, four hundred forty-four thousand, five hundred twenty".