2780355 has 16 divisors (see below), whose sum is σ = 4642560. Its totient is φ = 1418208.

The previous prime is 2780353. The next prime is 2780357. The reversal of 2780355 is 5530872.

It is a happy number.

2780355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2780353) and next prime (2780357).

It is not a de Polignac number, because 2780355 - 2¹ = 2780353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2780353) 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 15 ways as a sum of consecutive naturals, for example, 3685 + ... + 4374.

It is an arithmetic number, because the mean of its divisors is an integer number (290160).

2^2780355 is an apocalyptic number.

2780355 is a deficient number, since it is larger than the sum of its proper divisors (1862205).

2780355 is a wasteful number, since it uses less digits than its factorization.

2780355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8090.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 2780355 is about 1667.4396540805. The cubic root of 2780355 is about 140.6155717136.

The spelling of 2780355 in words is "two million, seven hundred eighty thousand, three hundred fifty-five".