2320432640 has 80 divisors (see below), whose sum is σ = 5604485040. Its totient is φ = 921354240.

The previous prime is 2320432637. The next prime is 2320432649. The reversal of 2320432640 is 462340232.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2320432649) 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, 352580 + ... + 359100.

It is an arithmetic number, because the mean of its divisors is an integer number (70056063).

Almost surely, 2^2320432640 is an apocalyptic number.

2320432640 is a gapful number since it is divisible by the number (20) 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 2320432640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2802242520).

2320432640 is an abundant number, since it is smaller than the sum of its proper divisors (3284052400).

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

2320432640 is an equidigital number, since it uses as much as digits as its factorization.

2320432640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6683 (or 6667 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 2320432640 is about 48170.8692053610. The cubic root of 2320432640 is about 1323.9034744330.

Adding to 2320432640 its reverse (462340232), we get a palindrome (2782772872).

The spelling of 2320432640 in words is "two billion, three hundred twenty million, four hundred thirty-two thousand, six hundred forty".