2765780 has 12 divisors (see below), whose sum is σ = 5808180. Its totient is φ = 1106304.

The previous prime is 2765779. The next prime is 2765783. The reversal of 2765780 is 875672.

2765780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1817104 + 948676 = 1348^2 + 974^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2765780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2765783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69125 + ... + 69164.

It is an arithmetic number, because the mean of its divisors is an integer number (484015).

2^2765780 is an apocalyptic number.

2765780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2765780 is an abundant number, since it is smaller than the sum of its proper divisors (3042400).

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

2765780 is a wasteful number, since it uses less digits than its factorization.

2765780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138298 (or 138296 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 2765780 is about 1663.0634383571. The cubic root of 2765780 is about 140.3694324463.

The spelling of 2765780 in words is "two million, seven hundred sixty-five thousand, seven hundred eighty".