2638928788 has 12 divisors (see below), whose sum is σ = 4620067200. Its totient is φ = 1318909592.

The previous prime is 2638928767. The next prime is 2638928821. The reversal of 2638928788 is 8878298362.

It is a congruent number.

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, 127906 + ... + 147097.

It is an arithmetic number, because the mean of its divisors is an integer number (385005600).

Almost surely, 2^2638928788 is an apocalyptic number.

It is an amenable number.

2638928788 is a deficient number, since it is larger than the sum of its proper divisors (1981138412).

2638928788 is a wasteful number, since it uses less digits than its factorization.

2638928788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277406 (or 277404 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 61.

The square root of 2638928788 is about 51370.5050393706. The cubic root of 2638928788 is about 1381.8976881806.

The spelling of 2638928788 in words is "two billion, six hundred thirty-eight million, nine hundred twenty-eight thousand, seven hundred eighty-eight".