2128087660 has 24 divisors (see below), whose sum is σ = 4509988560. Its totient is φ = 843424704.

The previous prime is 2128087649. The next prime is 2128087669. The reversal of 2128087660 is 667808212.

It is not an unprimeable number, because it can be changed into a prime (2128087669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485914 + ... + 490273.

It is an arithmetic number, because the mean of its divisors is an integer number (187916190).

Almost surely, 2^2128087660 is an apocalyptic number.

2128087660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2128087660 is an abundant number, since it is smaller than the sum of its proper divisors (2381900900).

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

2128087660 is a wasteful number, since it uses less digits than its factorization.

2128087660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976305 (or 976303 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 2128087660 is about 46131.2005046476. The cubic root of 2128087660 is about 1286.2631797317.

The spelling of 2128087660 in words is "two billion, one hundred twenty-eight million, eighty-seven thousand, six hundred sixty".