4320522640 has 160 divisors (see below), whose sum is σ = 11823528960. Its totient is φ = 1437696000.

The previous prime is 4320522637. The next prime is 4320522649. The reversal of 4320522640 is 462250234.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 4320522599 and 4320522608.

It is not an unprimeable number, because it can be changed into a prime (4320522649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2697840 + ... + 2699440.

It is an arithmetic number, because the mean of its divisors is an integer number (73897056).

Almost surely, 2^4320522640 is an apocalyptic number.

4320522640 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 4320522640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5911764480).

4320522640 is an abundant number, since it is smaller than the sum of its proper divisors (7503006320).

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

4320522640 is a wasteful number, since it uses less digits than its factorization.

4320522640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 4320522640 is about 65730.6826375628. The cubic root of 4320522640 is about 1628.7162461614.

Adding to 4320522640 its reverse (462250234), we get a palindrome (4782772874).

The spelling of 4320522640 in words is "four billion, three hundred twenty million, five hundred twenty-two thousand, six hundred forty".