2638478530 has 8 divisors (see below), whose sum is σ = 4749261372. Its totient is φ = 1055391408.

The previous prime is 2638478519. The next prime is 2638478561. The reversal of 2638478530 is 358748362.

It can be written as a sum of positive squares in 2 ways, for example, as 2637130609 + 1347921 = 51353^2 + 1161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 131923917 + ... + 131923936.

Almost surely, 2^2638478530 is an apocalyptic number.

2638478530 is a deficient number, since it is larger than the sum of its proper divisors (2110782842).

2638478530 is a wasteful number, since it uses less digits than its factorization.

2638478530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263847860.

The product of its (nonzero) digits is 967680, while the sum is 46.

The square root of 2638478530 is about 51366.1223959917. The cubic root of 2638478530 is about 1381.8190898894.

The spelling of 2638478530 in words is "two billion, six hundred thirty-eight million, four hundred seventy-eight thousand, five hundred thirty".