2638515244 has 12 divisors (see below), whose sum is σ = 4648392000. Its totient is φ = 1310403248.

The previous prime is 2638515241. The next prime is 2638515287. The reversal of 2638515244 is 4425158362.

It is a junction number, because it is equal to n+sod(n) for n = 2638515197 and 2638515206.

It is not an unprimeable number, because it can be changed into a prime (2638515241) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2212924 + ... + 2214115.

It is an arithmetic number, because the mean of its divisors is an integer number (387366000).

Almost surely, 2^2638515244 is an apocalyptic number.

It is an amenable number.

2638515244 is a deficient number, since it is larger than the sum of its proper divisors (2009876756).

2638515244 is a wasteful number, since it uses less digits than its factorization.

2638515244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427192 (or 4427190 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The square root of 2638515244 is about 51366.4797703717. The cubic root of 2638515244 is about 1381.8254991224.

The spelling of 2638515244 in words is "two billion, six hundred thirty-eight million, five hundred fifteen thousand, two hundred forty-four".