4004396440 has 32 divisors (see below), whose sum is σ = 9828974160. Its totient is φ = 1456144000.

The previous prime is 4004396419. The next prime is 4004396441. The reversal of 4004396440 is 446934004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 4004396396 and 4004396405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004396441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4550011 + ... + 4550890.

Almost surely, 2^4004396440 is an apocalyptic number.

4004396440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4004396440 is an abundant number, since it is smaller than the sum of its proper divisors (5824577720).

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

4004396440 is a wasteful number, since it uses less digits than its factorization.

4004396440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9100923 (or 9100919 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 4004396440 is about 63280.3005681863. The cubic root of 4004396440 is about 1587.9824151496.

It can be divided in two parts, 40043964 and 40, that added together give a palindrome (40044004).

The spelling of 4004396440 in words is "four billion, four million, three hundred ninety-six thousand, four hundred forty".