2780755 has 8 divisors (see below), whose sum is σ = 3408192. Its totient is φ = 2177088.

The previous prime is 2780753. The next prime is 2780761. The reversal of 2780755 is 5570872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2780755 - 2¹ = 2780753 is a prime.

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 2780755.

It is not an unprimeable number, because it can be changed into a prime (2780753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5682 + ... + 6151.

It is an arithmetic number, because the mean of its divisors is an integer number (426024).

2^2780755 is an apocalyptic number.

2780755 is a deficient number, since it is larger than the sum of its proper divisors (627437).

2780755 is a wasteful number, since it uses less digits than its factorization.

2780755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11885.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 2780755 is about 1667.5595941375. The cubic root of 2780755 is about 140.6223146812.

The spelling of 2780755 in words is "two million, seven hundred eighty thousand, seven hundred fifty-five".