6638862828 has 36 divisors (see below), whose sum is σ = 16773936648. Its totient is φ = 2042726400.

The previous prime is 6638862823. The next prime is 6638862851. The reversal of 6638862828 is 8282688366.

It is not an unprimeable number, because it can be changed into a prime (6638862823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1634773 + ... + 1638828.

Almost surely, 2^6638862828 is an apocalyptic number.

It is an amenable number.

6638862828 is an abundant number, since it is smaller than the sum of its proper divisors (10135073820).

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

6638862828 is a wasteful number, since it uses less digits than its factorization.

6638862828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273634 (or 3273619 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 57.

The square root of 6638862828 is about 81479.2171538240. The cubic root of 6638862828 is about 1879.4519705625.

The spelling of 6638862828 in words is "six billion, six hundred thirty-eight million, eight hundred sixty-two thousand, eight hundred twenty-eight".