2638843056 has 80 divisors (see below), whose sum is σ = 7593844320. Its totient is φ = 877363200.

The previous prime is 2638843007. The next prime is 2638843073. The reversal of 2638843056 is 6503488362.

It is a happy number.

2638843056 is a `hidden beast` number, since 2 + 638 + 8 + 4 + 3 + 0 + 5 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165616 + ... + 180848.

It is an arithmetic number, because the mean of its divisors is an integer number (94923054).

Almost surely, 2^2638843056 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 2638843056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3796922160).

2638843056 is an abundant number, since it is smaller than the sum of its proper divisors (4955001264).

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

2638843056 is a wasteful number, since it uses less digits than its factorization.

2638843056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15651 (or 15639 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The square root of 2638843056 is about 51369.6705848889. The cubic root of 2638843056 is about 1381.8827232529.

The spelling of 2638843056 in words is "two billion, six hundred thirty-eight million, eight hundred forty-three thousand, fifty-six".