2878569 has 24 divisors (see below), whose sum is σ = 4422600. Its totient is φ = 1800960.

The previous prime is 2878543. The next prime is 2878573. The reversal of 2878569 is 9658782.

2878569 is a `hidden beast` number, since 2 + 87 + 8 + 569 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 56169 + 2822400 = 237^2 + 1680^2 .

It is not a de Polignac number, because 2878569 - 2⁵ = 2878537 is a prime.

It is a super-2 number, since 2×2878569² = 16572318975522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878769) 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 23 ways as a sum of consecutive naturals, for example, 10567 + ... + 10835.

It is an arithmetic number, because the mean of its divisors is an integer number (184275).

2^2878569 is an apocalyptic number.

2878569 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2878569 is a deficient number, since it is larger than the sum of its proper divisors (1544031).

2878569 is a wasteful number, since it uses less digits than its factorization.

2878569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 342 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 2878569 is about 1696.6346100442. The cubic root of 2878569 is about 142.2521638575.

The spelling of 2878569 in words is "two million, eight hundred seventy-eight thousand, five hundred sixty-nine".