2638318620 has 48 divisors (see below), whose sum is σ = 8442620928. Its totient is φ = 603044160.

The previous prime is 2638318591. The next prime is 2638318651. The reversal of 2638318620 is 268138362.

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, 3140436 + ... + 3141275.

It is an arithmetic number, because the mean of its divisors is an integer number (175887936).

Almost surely, 2^2638318620 is an apocalyptic number.

2638318620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2638318620 is an abundant number, since it is smaller than the sum of its proper divisors (5804302308).

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

2638318620 is a wasteful number, since it uses less digits than its factorization.

2638318620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281730 (or 6281728 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 2638318620 is about 51364.5658017276. The cubic root of 2638318620 is about 1381.7911734024.

The spelling of 2638318620 in words is "two billion, six hundred thirty-eight million, three hundred eighteen thousand, six hundred twenty".