4448699640 has 576 divisors, whose sum is σ = 18737671680. Its totient is φ = 889228800.

The previous prime is 4448699603. The next prime is 4448699641. The reversal of 4448699640 is 469968444.

It is a happy number.

It is a super-2 number, since 2×4448699640² = 39581856973872259200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4448699641) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 26638837 + ... + 26639003.

It is an arithmetic number, because the mean of its divisors is an integer number (32530680).

Almost surely, 2^4448699640 is an apocalyptic number.

4448699640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4448699640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9368835840).

4448699640 is an abundant number, since it is smaller than the sum of its proper divisors (14288972040).

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

4448699640 is a wasteful number, since it uses less digits than its factorization.

4448699640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The square root of 4448699640 is about 66698.5729982284. The cubic root of 4448699640 is about 1644.6659262529.

It can be divided in two parts, 44 and 48699640, that added together give a palindrome (48699684).

The spelling of 4448699640 in words is "four billion, four hundred forty-eight million, six hundred ninety-nine thousand, six hundred forty".