2878345 has 4 divisors (see below), whose sum is σ = 3454020. Its totient is φ = 2302672.

The previous prime is 2878333. The next prime is 2878361. The reversal of 2878345 is 5438782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5438782 = 2 ⋅2719391.

It can be written as a sum of positive squares in 2 ways, for example, as 292681 + 2585664 = 541^2 + 1608^2 .

It is a cyclic number.

It is not a de Polignac number, because 2878345 - 2⁵ = 2878313 is a prime.

2878345 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 287830 + ... + 287839.

It is an arithmetic number, because the mean of its divisors is an integer number (863505).

2^2878345 is an apocalyptic number.

It is an amenable number.

2878345 is a deficient number, since it is larger than the sum of its proper divisors (575675).

2878345 is an equidigital number, since it uses as much as digits as its factorization.

2878345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575674.

The product of its digits is 53760, while the sum is 37.

The square root of 2878345 is about 1696.5685957249. The cubic root of 2878345 is about 142.2484739094.

It can be divided in two parts, 2878 and 345, that added together give a palindrome (3223).

The spelling of 2878345 in words is "two million, eight hundred seventy-eight thousand, three hundred forty-five".