2028938688 has 126 divisors (see below), whose sum is σ = 6765164016. Its totient is φ = 579688704.

The previous prime is 2028938683. The next prime is 2028938701. The reversal of 2028938688 is 8868398202.

It is a tau number, because it is divible by the number of its divisors (126).

It is a super-2 number, since 2×2028938688² = 8233184399326322688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028938683) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7720 + ... + 64167.

Almost surely, 2^2028938688 is an apocalyptic number.

2028938688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2028938688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3382582008).

2028938688 is an abundant number, since it is smaller than the sum of its proper divisors (4736225328).

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

2028938688 is a wasteful number, since it uses less digits than its factorization.

2028938688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71919 (or 71899 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The square root of 2028938688 is about 45043.7419404738. The cubic root of 2028938688 is about 1265.9687181088.

The spelling of 2028938688 in words is "two billion, twenty-eight million, nine hundred thirty-eight thousand, six hundred eighty-eight".