2639647320 has 32 divisors (see below), whose sum is σ = 7918942320. Its totient is φ = 703905920.

The previous prime is 2639647289. The next prime is 2639647379. The reversal of 2639647320 is 237469362.

2639647320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10998411 + ... + 10998650.

Almost surely, 2^2639647320 is an apocalyptic number.

2639647320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2639647320 is an abundant number, since it is smaller than the sum of its proper divisors (5279295000).

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

2639647320 is a wasteful number, since it uses less digits than its factorization.

2639647320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21997075 (or 21997071 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 42.

The square root of 2639647320 is about 51377.4981874361. The cubic root of 2639647320 is about 1382.0230986133.

The spelling of 2639647320 in words is "two billion, six hundred thirty-nine million, six hundred forty-seven thousand, three hundred twenty".