2773645 has 12 divisors (see below), whose sum is σ = 3872124. Its totient is φ = 1901760.

The previous prime is 2773637. The next prime is 2773651. The reversal of 2773645 is 5463772.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 550564 + 2223081 = 742^2 + 1491^2 .

It is not a de Polignac number, because 2773645 - 2³ = 2773637 is a prime.

It is a super-3 number, since 3×2773645³ = 64013839850385933375, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2773645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5416 + ... + 5905.

It is an arithmetic number, because the mean of its divisors is an integer number (322677).

2^2773645 is an apocalyptic number.

It is an amenable number.

2773645 is a deficient number, since it is larger than the sum of its proper divisors (1098479).

2773645 is a wasteful number, since it uses less digits than its factorization.

2773645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11340 (or 11333 counting only the distinct ones).

The product of its digits is 35280, while the sum is 34.

The square root of 2773645 is about 1665.4263718340. The cubic root of 2773645 is about 140.5023618858.

The spelling of 2773645 in words is "two million, seven hundred seventy-three thousand, six hundred forty-five".