2638319828 has 12 divisors (see below), whose sum is σ = 4888651572. Its totient is φ = 1241562240.

The previous prime is 2638319809. The next prime is 2638319837. The reversal of 2638319828 is 8289138362.

It can be written as a sum of positive squares in 2 ways, for example, as 1274347204 + 1363972624 = 35698^2 + 36932^2 .

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 3 ways as a sum of consecutive naturals, for example, 19399343 + ... + 19399478.

It is an arithmetic number, because the mean of its divisors is an integer number (407387631).

Almost surely, 2^2638319828 is an apocalyptic number.

It is an amenable number.

2638319828 is a deficient number, since it is larger than the sum of its proper divisors (2250331744).

2638319828 is a wasteful number, since it uses less digits than its factorization.

2638319828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38798842 (or 38798840 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The square root of 2638319828 is about 51364.5775608055. The cubic root of 2638319828 is about 1381.7913842947.

The spelling of 2638319828 in words is "two billion, six hundred thirty-eight million, three hundred nineteen thousand, eight hundred twenty-eight".