2172028278 has 32 divisors (see below), whose sum is σ = 4982330880. Its totient is φ = 618367680.

The previous prime is 2172028247. The next prime is 2172028319. The reversal of 2172028278 is 8728202712.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80218 + ... + 103821.

It is an arithmetic number, because the mean of its divisors is an integer number (155697840).

Almost surely, 2^2172028278 is an apocalyptic number.

2172028278 is an abundant number, since it is smaller than the sum of its proper divisors (2810302602).

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

2172028278 is a wasteful number, since it uses less digits than its factorization.

2172028278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184332.

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 2172028278 is about 46605.0241712200. The cubic root of 2172028278 is about 1295.0558311871.

The spelling of 2172028278 in words is "two billion, one hundred seventy-two million, twenty-eight thousand, two hundred seventy-eight".