2772128 has 12 divisors (see below), whose sum is σ = 5457690. Its totient is φ = 1386048.

The previous prime is 2772127. The next prime is 2772131. The reversal of 2772128 is 8212772.

It can be written as a sum of positive squares in only one way, i.e., 2347024 + 425104 = 1532^2 + 652^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2772128.

It is not an unprimeable number, because it can be changed into a prime (2772127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43283 + ... + 43346.

2^2772128 is an apocalyptic number.

It is an amenable number.

2772128 is a deficient number, since it is larger than the sum of its proper divisors (2685562).

2772128 is an equidigital number, since it uses as much as digits as its factorization.

2772128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86639 (or 86631 counting only the distinct ones).

The product of its digits is 3136, while the sum is 29.

The square root of 2772128 is about 1664.9708706161. The cubic root of 2772128 is about 140.4767420543.

The spelling of 2772128 in words is "two million, seven hundred seventy-two thousand, one hundred twenty-eight".