2128557200 has 120 divisors (see below), whose sum is σ = 6375812160. Its totient is φ = 663436800.

The previous prime is 2128557181. The next prime is 2128557217. The reversal of 2128557200 is 27558212.

It is a happy number.

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, 3755 + ... + 65354.

It is an arithmetic number, because the mean of its divisors is an integer number (53131768).

Almost surely, 2^2128557200 is an apocalyptic number.

2128557200 is a gapful number since it is divisible by the number (20) 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 2128557200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3187906080).

2128557200 is an abundant number, since it is smaller than the sum of its proper divisors (4247254960).

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

2128557200 is a wasteful number, since it uses less digits than its factorization.

2128557200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69145 (or 69134 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 2128557200 is about 46136.2894043290. The cubic root of 2128557200 is about 1286.3577728903.

The spelling of 2128557200 in words is "two billion, one hundred twenty-eight million, five hundred fifty-seven thousand, two hundred".