2771649 has 12 divisors (see below), whose sum is σ = 4017936. Its totient is φ = 1841112.

The previous prime is 2771623. The next prime is 2771669. The reversal of 2771649 is 9461772.

It is a happy number.

2771649 is a `hidden beast` number, since 2 + 7 + 7 + 1 + 649 = 666.

It is not a de Polignac number, because 2771649 - 2¹¹ = 2769601 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2771609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4642 + ... + 5204.

It is an arithmetic number, because the mean of its divisors is an integer number (334828).

2^2771649 is an apocalyptic number.

It is an amenable number.

2771649 is a deficient number, since it is larger than the sum of its proper divisors (1246287).

2771649 is a wasteful number, since it uses less digits than its factorization.

2771649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116 (or 1113 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 2771649 is about 1664.8270180412. The cubic root of 2771649 is about 140.4686505285.

The spelling of 2771649 in words is "two million, seven hundred seventy-one thousand, six hundred forty-nine".