3800120128 has 84 divisors (see below), whose sum is σ = 8815132992. Its totient is φ = 1620622080.

The previous prime is 3800120101. The next prime is 3800120161. The reversal of 3800120128 is 8210210083.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 658825 + ... + 664567.

Almost surely, 2^3800120128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3800120128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4407566496).

3800120128 is an abundant number, since it is smaller than the sum of its proper divisors (5015012864).

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

3800120128 is a wasteful number, since it uses less digits than its factorization.

3800120128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5980 (or 5963 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 3800120128 is about 61645.1143887332. The cubic root of 3800120128 is about 1560.5071942743.

The spelling of 3800120128 in words is "three billion, eight hundred million, one hundred twenty thousand, one hundred twenty-eight".