4640638432 has 96 divisors (see below), whose sum is σ = 9919324800. Its totient is φ = 2129960448.

The previous prime is 4640638421. The next prime is 4640638469. The reversal of 4640638432 is 2348360464.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3633378 + ... + 3634654.

It is an arithmetic number, because the mean of its divisors is an integer number (103326300).

Almost surely, 2^4640638432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4640638432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4959662400).

4640638432 is an abundant number, since it is smaller than the sum of its proper divisors (5278686368).

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

4640638432 is a wasteful number, since it uses less digits than its factorization.

4640638432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488 (or 1480 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

The square root of 4640638432 is about 68122.2315547575. The cubic root of 4640638432 is about 1667.9866772184.

Adding to 4640638432 its reverse (2348360464), we get a palindrome (6988998896).

The spelling of 4640638432 in words is "four billion, six hundred forty million, six hundred thirty-eight thousand, four hundred thirty-two".