2780523 has 12 divisors (see below), whose sum is σ = 4036968. Its totient is φ = 1844160.

The previous prime is 2780521. The next prime is 2780527. The reversal of 2780523 is 3250872.

It is not a de Polignac number, because 2780523 - 2¹ = 2780521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2780521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1363 + ... + 2723.

It is an arithmetic number, because the mean of its divisors is an integer number (336414).

2^2780523 is an apocalyptic number.

2780523 is a deficient number, since it is larger than the sum of its proper divisors (1256445).

2780523 is a wasteful number, since it uses less digits than its factorization.

2780523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 2780523 is about 1667.4900299552. The cubic root of 2780523 is about 140.6184038388.

The spelling of 2780523 in words is "two million, seven hundred eighty thousand, five hundred twenty-three".