4402006640 has 40 divisors (see below), whose sum is σ = 10773335760. Its totient is φ = 1668128256.

The previous prime is 4402006633. The next prime is 4402006649. The reversal of 4402006640 is 466002044.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4402006649) 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, 1446509 + ... + 1449548.

It is an arithmetic number, because the mean of its divisors is an integer number (269333394).

Almost surely, 2^4402006640 is an apocalyptic number.

4402006640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4402006640 is an abundant number, since it is smaller than the sum of its proper divisors (6371329120).

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

4402006640 is a wasteful number, since it uses less digits than its factorization.

4402006640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896089 (or 2896083 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 4402006640 is about 66347.6197010865. The cubic root of 4402006640 is about 1638.8916068024.

Adding to 4402006640 its reverse (466002044), we get a palindrome (4868008684).

The spelling of 4402006640 in words is "four billion, four hundred two million, six thousand, six hundred forty".