4004421504 has 64 divisors (see below), whose sum is σ = 10645548240. Its totient is φ = 1333702656.

The previous prime is 4004421503. The next prime is 4004421523. The reversal of 4004421504 is 4051244004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004421503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554364 + ... + 561540.

Almost surely, 2^4004421504 is an apocalyptic number.

It is an amenable number.

4004421504 is an abundant number, since it is smaller than the sum of its proper divisors (6641126736).

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

4004421504 is a wasteful number, since it uses less digits than its factorization.

4004421504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8647 (or 8635 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 4004421504 is about 63280.4986073909. The cubic root of 4004421504 is about 1587.9857282671.

Adding to 4004421504 its reverse (4051244004), we get a palindrome (8055665508).

The spelling of 4004421504 in words is "four billion, four million, four hundred twenty-one thousand, five hundred four".