2638507980 has 24 divisors (see below), whose sum is σ = 7387822512. Its totient is φ = 703602112.

The previous prime is 2638507919. The next prime is 2638508011. The reversal of 2638507980 is 897058362.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21987507 + ... + 21987626.

It is an arithmetic number, because the mean of its divisors is an integer number (307825938).

Almost surely, 2^2638507980 is an apocalyptic number.

2638507980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2638507980 is an abundant number, since it is smaller than the sum of its proper divisors (4749314532).

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

2638507980 is a wasteful number, since it uses less digits than its factorization.

2638507980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43975145 (or 43975143 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 2638507980 is about 51366.4090627328. The cubic root of 2638507980 is about 1381.8242310367.

The spelling of 2638507980 in words is "two billion, six hundred thirty-eight million, five hundred seven thousand, nine hundred eighty".