2750638128 has 120 divisors (see below), whose sum is σ = 8291866608. Its totient is φ = 783433728.

The previous prime is 2750638087. The next prime is 2750638157. The reversal of 2750638128 is 8218360572.

It is a super-2 number, since 2×2750638128² = 15132020222414688768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 2750638128.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 828600 + ... + 831912.

Almost surely, 2^2750638128 is an apocalyptic number.

2750638128 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 2750638128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4145933304).

2750638128 is an abundant number, since it is smaller than the sum of its proper divisors (5541228480).

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

2750638128 is a wasteful number, since it uses less digits than its factorization.

2750638128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691 (or 3678 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 2750638128 is about 52446.5263673391. The cubic root of 2750638128 is about 1401.1280242045.

The spelling of 2750638128 in words is "two billion, seven hundred fifty million, six hundred thirty-eight thousand, one hundred twenty-eight".