2775216 has 80 divisors (see below), whose sum is σ = 8035200. Its totient is φ = 820224.

The previous prime is 2775193. The next prime is 2775221. The reversal of 2775216 is 6125772.

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, 15415 + ... + 15593.

It is an arithmetic number, because the mean of its divisors is an integer number (100440).

2^2775216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2775216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4017600).

2775216 is an abundant number, since it is smaller than the sum of its proper divisors (5259984).

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

2775216 is a wasteful number, since it uses less digits than its factorization.

2775216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 220 counting only the distinct ones).

The product of its digits is 5880, while the sum is 30.

The square root of 2775216 is about 1665.8979560585. The cubic root of 2775216 is about 140.5288838512.

The spelling of 2775216 in words is "two million, seven hundred seventy-five thousand, two hundred sixteen".