2128686285 has 32 divisors (see below), whose sum is σ = 3737052288. Its totient is φ = 1026110720.

The previous prime is 2128686283. The next prime is 2128686341. The reversal of 2128686285 is 5826868212.

It is a happy number.

It is not a de Polignac number, because 2128686285 - 2¹ = 2128686283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128686281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8742 + ... + 65831.

It is an arithmetic number, because the mean of its divisors is an integer number (116782884).

Almost surely, 2^2128686285 is an apocalyptic number.

It is an amenable number.

2128686285 is a deficient number, since it is larger than the sum of its proper divisors (1608366003).

2128686285 is a wasteful number, since it uses less digits than its factorization.

2128686285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74765.

The product of its digits is 737280, while the sum is 48.

The square root of 2128686285 is about 46137.6883361098. The cubic root of 2128686285 is about 1286.3837758148.

The spelling of 2128686285 in words is "two billion, one hundred twenty-eight million, six hundred eighty-six thousand, two hundred eighty-five".