2128265280 has 280 divisors, whose sum is σ = 7736116608. Its totient is φ = 555144192.

The previous prime is 2128265273. The next prime is 2128265281. The reversal of 2128265280 is 825628212.

2128265280 is a `hidden beast` number, since 2 + 128 + 2 + 6 + 528 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2128265281) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1217367 + ... + 1219113.

Almost surely, 2^2128265280 is an apocalyptic number.

2128265280 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 2128265280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3868058304).

2128265280 is an abundant number, since it is smaller than the sum of its proper divisors (5607851328).

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

2128265280 is a wasteful number, since it uses less digits than its factorization.

2128265280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823 (or 1804 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 2128265280 is about 46133.1256257367. The cubic root of 2128265280 is about 1286.2989645531.

The spelling of 2128265280 in words is "two billion, one hundred twenty-eight million, two hundred sixty-five thousand, two hundred eighty".